In this trademark infringement action, plaintiff Dranoff-Perlstein Associates appeals the district court's order granting summary judgment for defendant Harris J. Sklar. We agree with the district court that a portion of plaintiff's mark is generic and unprotectible. However, because we are unable to determine on the present record whether there is a likelihood of confusion between the parties' marks as a whole, we will reverse and remand for further proceedings.

Dranoff-Perlstein Associates and Harris J. Sklar both practice personal injury law in the Delaware Valley. In 1984, Dranoff-Perlstein began using "INJURY-1" as its telephone number, and embarked on an advertising campaign designed to capitalize on that mnemonic.1 The campaign included, among other things, sixty-second radio advertisements on several popular local radio stations;2 advertisements in the "yellow pages" of the telephone book;3 and postage meter tapes with a telephone and the number "I-N-J-U-R-Y-1" prominently featured.

In 1990, Sklar obtained the telephone number "INJURY-9," and began an advertising campaign designed to capitalize on his mnemonic. Sklar's campaign included radio spots,4 advertisements in the yellow pages, newsletters, and handbills, all of which prominently featured the INJURY-9 mnemonic.

On May 4, 1990, Sklar applied for registration of "INJURY-9" as a service mark on the principal register at the United States Patent and Trademark Office. On May 29, 1990, Dranoff-Perlstein applied for registration of "INJURY-1" as a service mark.

On July 31, 1990, Dranoff-Perlstein filed this action in the United States District Court for the Eastern District of Pennsylvania. In its Amended Complaint, Dranoff-Perlstein alleged that Sklar's use of "INJURY-9" constituted unfair competition and trademark infringement under the common law and § 43(a) of the Lanham Act, 15 U.S.C. § 1125(a) (1988), which governs unregistered trademarks. The Amended Complaint also included a pendent state law claim for trademark dilution under 54 Pa.Cons.Stat.Ann. § 1124.

On November 21, 1990, Dranoff-Perlstein asked the Patent and Trademark Office to suspend prosecution of Sklar's application for registration during the pendency of this case. That request was granted on November 28, 1990.

On cross-motions for summary judgment, the district court granted Sklar's motion, and dismissed the case with prejudice. The court held, in the alternative: (1) that the marks in question were "functional and generic," and thus not entitled to trademark protection; or (2) if the marks were descriptive, that no showing of "secondary meaning" had been or could be made that would justify trademark protection.

The district court had original jurisdiction under 28 U.S.C. § 1338. We have appellate jurisdiction under 28 U.S.C. § 1291.

In our plenary review of the district court's grant of summary judgment, we apply " 'the same test the district court should have utilized initially.' " Erie Telecommunications, Inc. v. City of Erie, 853 F.2d 1084, 1093 (3d Cir.1988) (quoting Goodman v. Mead Johnson & Co., 534 F.2d 566, 573 (3d Cir.1976), cert. denied, 429 U.S. 1038, 97 S. Ct. 732, 50 L. Ed. 2d 748 (1977)). Therefore, we must determine whether the evidence, taken in the light most favorable to Sklar, demonstrates that there are no genuine issues of material fact and that Dranoff-Perlstein is entitled to judgment as a matter of law. Id.

Section 43(a) of the Lanham Act "extends protection to unregistered trademarks on the principle that unlicensed use of a designation serving the function of a registered mark constitutes a false designation of origin and a false description or representation." A.J. Canfield Co. v. Honickman, 808 F.2d 291, 296 (3d Cir.1986). However, a designation is only protectible "if the public recognizes it as identifying the claimant's 'goods or services and distinguishing them from those of others.' " Id. (quoting 1 J. Thomas McCarthy, Trademarks and Unfair Competition § 15:1, at 657 (2d ed. 1984)).

Under the Lanham Act, service marks, which are used to identify the source of services, are entitled to the same legal protection as trademarks, which are used to identify the source of goods. 1 Jerome Gilson, Trademark Protection and Practice § 1.02[b], at 1-11 (1991). Although technically distinct, the terms are often used interchangeably, with no significant legal consequences. Id.

Trademark law recognizes four separate categories of marks, based on their levels of inherent distinctiveness. From most distinctive to least distinctive, these categories are: (1) arbitrary terms; (2) suggestive terms; (3) descriptive terms; and (4) generic terms. Although these categories are often separated by only the finest of lines,5 the "distinctions are crucial," for:

If we hold a term arbitrary or suggestive, we treat it as distinctive, and it automatically qualifies for trademark protection at least in those geographic and product areas in which the senior user applies it to its goods. If we hold a mark descriptive, a claimant can still establish trademark rights, but only if it proves that consumers identify the term with the claimant, for that identification proves secondary meaning.... Finally, if we hold a designation generic, it is never protectable because even complete "success ... in securing public identification ... cannot deprive competing manufacturers of the product of the right to call an article by its name."

Honickman, 808 F.2d at 297 (quoting Abercrombie & Fitch Co. v. Hunting World, Inc., 537 F.2d 4, 9 (2d Cir.1976)) (other citations omitted).

One question presented by this case is whether a service mark that corresponds to the markholder's telephone number may acquire trademark protection. The mere fact that the parties' marks correspond to their telephone numbers does not substantially alter our analysis.6 Most courts to consider the question have held that marks which correspond to telephone numbers may be protectible. See, e.g., Dial-A-Mattress Franchise Corp. v. Page, 880 F.2d 675 (2d Cir.1989); Murrin v. Midco Communications, Inc., 726 F. Supp. 1195 (D.Minn.1989); American Airlines, Inc. v. A 1-800-A-M-E-R-I-C-A-N Corp., 622 F. Supp. 673 (N.D.Ill.1985); Chicago World's Fair--1992 Corp. v. 1992 Chicago Worlds' Fair Comm'n, No. 83-C-3424, slip op. (N.D.Ill. Aug. 16, 1983). See also 3 Rudolf Callman, The Law of Unfair Competition, Trademarks and Monopolies § 18.23, at 209 (Supp. Nov. 1991) ("Telephone numbers may be protected as trademarks."). But see Cytanovich Reading Ctr. v. Reading Game, 162 Cal. App. 3d 107, 208 Cal. Rptr. 412, 225 U.S.P.Q. (BNA) 588 (1984).

"[T]o function as a trademark, a term must be ... an indicator of source, sponsorship, approval or affiliation." Honickman, 808 F.2d at 305 (quoting S.Rep. No. 627, 98th Cong., 2d Sess. 2, reprinted in 1984 U.S.C.C.A.N. 5719). To the extent a mark that corresponds to a telephone number performs these functions, it may, if the other requirements of trademark law are met, be entitled to trademark protection. Dial-A-Mattress, 880 F.2d 675. As the United States Court of Appeals for the Second Circuit has noted, "Companies doing significant business through telephone orders frequently promote their telephone numbers as a key identification of the source of their products." Dial-A-Mattress, 880 F.2d at 678. Although law firms and other providers of services do not solicit "telephone orders," some firms do generate significant business through telephone inquiries. Like vendors of consumer products, service providers "frequently promote their telephone numbers as a key identification of the source" of their services.7

The use of telephone numbers as service marks appears to be a relatively recent phenomenon. As late as 1984, one court noted that it was unable to find any appellate cases on the question whether telephone numbers could constitute service marks. Cytanovich Reading Ctr. v. Reading Game, 162 Cal. App. 3d 107, 208 Cal. Rptr. 412, 225 U.S.P.Q. (BNA) 588 (1984). Even today, the only federal appellate case addressing whether telephone numbers may receive trademark protection appears to be the decision of the United States Court of Appeals for the Second Circuit in Dial-A-Mattress Franchise Corp. v. Page, 880 F.2d 675 (2d Cir.1989). In Dial-A-Mattress, the court affirmed the district court's order enjoining defendant from using the telephone number "1-800-MATTRESS" in regions in which the plaintiff corporation had previously solicited telephone orders at the number "(area code)-MATTRES." The court held that "a competitor's use of a confusingly similar telephone number may be enjoined as both trademark infringement and unfair competition." Id. at 678 (citations omitted). The court further held that even telephone numbers that correlated to generic terms were protectible; in its view, the principles limiting trademark protection for generic terms did not allow competitors to adopt a telephone number that was confusingly similar to that of the plaintiff, even if the plaintiff's telephone number correlated to a generic term. Id.

Relying in part on Dial-A-Mattress, the court in Murrin v. Midco Communications, Inc., 726 F. Supp. 1195 (D.Minn.1989), enjoined defendant from using the telephone number 800-529-9377 ("800-LAW-YERS") in a manner that would infringe plaintiff's service mark in the phrase "Dial LAWYERS." Specifically, the court enjoined defendant from "advertising or in any way using the telephone number (800) 529-9377 ... in conjunction with the word 'dial;' " and from "advertising or in any way using the telephone number (800) 529-9377 ... with any symbols resembling dots or hyphens between the letters of the word 'LAWYERS' when that word is used to indicate a telephone number." 726 F. Supp. at 1201.

The Second Circuit's decision in Dial-A-Mattress appears to hold that even if the letters correlating to a telephone number spell a generic term, that telephone number may be subject to trademark protection, despite the fact that generic terms ordinarily are not protectible. However, as this court stated in Honickman:

Underlying the genericness doctrine is the principle that some terms so directly signify the nature of the product that interests of competition demand that other producers be able to use them even if terms have or might become identified with a source and so acquire "de facto" secondary meaning.... Courts refuse to protect a generic term because competitors need it more to describe their goods than the claimed markholder needs it to distinguish its goods from others.

808 F.2d at 304. We see no reason to depart from this policy in the context of marks that correspond to telephone numbers. Therefore, we decline to adopt the position espoused by the Second Circuit that telephone numbers which correlate to generic terms may be protectible as trademarks.8

Generic terms are denied trademark protection because granting one firm their exclusive use would place competitors at a serious competitive disadvantage. 1 Gilson, supra, § 2.02, at 2-23. If telephone numbers that correlate to generic terms were granted protection, the first firm in a given market to obtain such a telephone number would, merely by winning the race to the telephone company,9 gain an unfair advantage over its competitors. See Anthony L. Fletcher and David J. Kera, The Forty-Third Year of Administration of the Lanham Trademark Act of 1946, 80 Trademark Rep. 591 (1990).10

Even though we decline to endorse the view of the courts in Dial-A-Mattress and Murrin that telephone numbers which correlate to generic terms may merit trademark protection, Dranoff-Perlstein would be entitled to prevail if its mark were found to be arbitrary, suggestive, or descriptive and possessing secondary meaning.11 Therefore, we must determine whether the district court erred in holding that "INJURY-1" is either (1) "generic," or (2) "descriptive" and without "secondary meaning." This court has defined the relevant terms as follows:

arbitrary (or fanciful) terms, which bear "no logical or suggestive relation to the actual characteristics of the goods;" suggestive terms, which suggest rather than describe the characteristics of the goods; descriptive terms, which describe a characteristic or ingredient of the article to which it refers, and generic terms, which function as the common descriptive name of a product class.

Honickman, 808 F.2d at 296 (emphasis added) (citing Keebler Co. v. Rovira Biscuit Corp., 624 F.2d 366, 374 n. 8 (1st Cir.1980)).

The mark is certainly not arbitrary; "INJURY-1" does bear some "logical or suggestive relation" to the services supplied by personal injury lawyers. Thus, the mark is either suggestive, descriptive, or generic.

Suggestive marks, like arbitrary marks, are "protected without any necessity for proving secondary meaning." 1 McCarthy, supra, § 11:20, at 488. "The descriptivesuggestive borderline is hardly a clear one.... The most popular test with the courts is the 'imagination' test." Id., § 11:21, at 491. One oft-quoted formulation of that test states:

A term is suggestive if it requires imagination, thought or perception to reach a conclusion as to the nature of goods. A term is descriptive if it forthwith conveys an immediate idea of the ingredients, qualities or characteristics of the goods.

Honickman, 808 F.2d at 297 (quoting Stix Prods., Inc. v. United Merchants & Mfrs., Inc., 295 F. Supp. 479 (S.D.N.Y.1968)); accord, 1 McCarthy, supra, § 11:21, at 491-92. Under this test, the mark appears to be descriptive (or generic), because little imagination is necessary in order to get from "INJURY-1" to personal injury lawyers; the word "INJURY" "forthwith conveys an immediate idea of the ... characteristic[ ]" of the services provided. Cf. Honickman, 808 F.2d at 298 ("Because chocolate fudge denotes a flavor, no imagination is required for a potential customer to reach a conclusion about the nature of Canfield's soda.").

In addition to the amount of imagination required to connect the term in question with a characteristic of the product or service being marketed, courts have considered "whether sellers of similar products [or services] are likely to use, or actually do use, the term in connection with their goods." Security Ctr., Ltd. v. First Nat'l Security Ctrs., 750 F.2d 1295, 1299 (5th Cir.1985). Frequent use of a term by sellers of similar products or services tends to indicate that the term is descriptive or generic rather than suggestive. Id. at 1300. Not surprisingly, the term "injury" is frequently used by personal injury lawyers in marketing their services.12

The policy underlying the distinction between descriptive and suggestive terms is that the automatic exclusion of a descriptive term from commercial use "would be commercially disruptive and unfair to competitors." Security Ctr., 750 F.2d at 1300. Although the distinction between suggestive and descriptive marks "is, undoubtedly, often made on an intuitive basis rather than as the result of a logical analysis susceptible of articulation," Union Carbide Corp. v. Ever-Ready Inc., 531 F.2d 366, 379 (7th Cir.1976), we are persuaded that "INJURY-1" lies on the descriptive side of that elusive boundary.13

Where a descriptive term has come to be identified with a single source of a product or service, competitors should not be allowed a "free ride" on the good will that source has created through its effort and investment. 1 McCarthy, supra, § 2.10, at 85. Therefore, a descriptive mark is protectible if it has acquired "secondary meaning." Id., § 11:9, at 453-55.14 One "excellent capsule definition of secondary meaning" states:

When a particular business has used words publici juris for so long or so exclusively or when it has promoted its product to such an extent that the words do not register their literal meaning on the public mind but are instantly associated with one enterprise, such words have attained a secondary meaning. That is to say, a secondary meaning exists when in addition to their literal, dictionary meaning, words connote to the public a product from a unique source.

1 McCarthy, supra, § 11:9, at 455-56 (quoting Charcoal Steak House, Inc. v. Staley, 263 N.C. 199, 139 S.E.2d 185 (1964)). In order for secondary meaning to exist, "it is not necessary for the public to be aware of the name of the [source].... It is sufficient if the public is aware that the product [or service] comes from a single, though anonymous, source." Union Carbide Corp., 531 F.2d at 380. The factors relevant to determining whether a mark has acquired secondary meaning include:

the extent of sales and advertising leading to buyer association, length of use, exclusivity of use, the fact of copying, customer surveys, customer testimony, the use of the mark in trade journals, the size of the company, the number of sales, the number of customers, and actual confusion.

Ford Motor Co. v. Summit Motor Prods., Inc., 930 F.2d 277, 292 (3d Cir.), cert. denied sub nom. Altran Corp. v. Ford Motor Co., --- U.S. ----, 112 S. Ct. 373, 116 L. Ed. 2d 324 (1991) (citations omitted).

"The question remains whether the term ... is descriptive because it only describes characteristics or functions of the product [or service] or whether it is so commonly descriptive of the name of the product [or service] that we should consider it generic." Honickman, 808 F.2d at 298.15 The test for genericness is whether consumers think the term represents "the generic name of the product [or service] or a mark indicating merely one source of that product [or service]." 1 McCarthy, supra, § 12:2, at 522 (citing Feathercombs, Inc. v. Solo Prods. Corp., 306 F.2d 251 (2d Cir.1962)). See also Honickman, 808 F.2d at 292-93 ("The jurisprudence of genericness revolves around the primary significance test, which inquires whether the primary significance of a term in the minds of the consuming public is the product [or service] or the [source].").

"To be generic, a term need not relate directly to the name of the product [or service], but may relate to some distinctive characteristic of that genus of products [or services]." 1 McCarthy, supra, § 12:2, at 526. A term that is generic for one type of product or service may be non-generic for another. A.J. Canfield Co. v. Vess Beverages, Inc., 796 F.2d 903, 906 (7th Cir.1986). See, e.g., Abercrombie & Fitch Co. v. Hunting World, Inc., 537 F.2d 4, 9 n. 6 (2d Cir.1976) (term "Ivory" generic as to products made from elephant tusks but arbitrary as to soap).

"The line between highly descriptive marks and generic names is as fuzzy and undefinable as the line between descriptive marks and suggestive marks. However, the difference is crucial. If determined to be generic, that term can never function as a mark or be given trademark protection; but if determined to be descriptive, the word can be given trademark protection upon proof of secondary meaning." 1 McCarthy, supra, § 12:5, at 539 (footnotes omitted).

In deciding whether a term is generic, courts have focused on the availability of commonly used alternatives. Honickman, 808 F.2d at 306 n. 20. As we noted in Honickman:

[I]f no commonly used alternative effectively communicates the same functional information, the term that denotes the product [or service] is generic. If we held otherwise, a grant of trademark status could effectively prevent a competitor from marketing a product [or service] with the same characteristic....

Id. at 306.

Because telephone numbers contain only an area code and seven digits, the range of commonly used alternatives which effectively communicate the same functional information as the word "injury" is severely limited in that context. For example, the phrase "personal injury," while otherwise an effective substitute, is too long for use as a telephone number. If Dranoff-Perlstein could preclude competitors from using the word "injury" in their telephone numbers, it would achieve the kind of unfair competitive advantage the genericness doctrine is supposed to prevent. See 1 Gilson, supra, § 2.02, at 2-23.

The determination whether the term "INJURY," as contained in "INJURY-1," is generic or descriptive depends in part on how we define the relevant product category, or "genus." Honickman, 808 F.2d at 298. If we define the genus as "lawyers," the term would appear to be descriptive. However, if we define the genus as "personal injury lawyers," the term would appear to be "so commonly descriptive of the name of the product [or service] that we should consider it generic." Honickman, 808 F.2d at 298.

As this court observed in Honickman, the usual tests for genericness provide little guidance on this issue. Id. at 301. After a thorough review of the law of genericness, the Honickman court stated:

Although we do not believe we have derived a formula that will differentiate the product brand from the product genus in all cases, we believe that application of these general principles of trademark law to this case, which involves at best a descriptive word not a coined term, is straightforward. We hold as follows: If a producer introduces a product that differs from an established product class in a particular characteristic, and uses a common descriptive term of that characteristic as the name of the product, then the product should be considered its own genus. Whether the term that identifies the product is generic then depends on the competitors' need to use it. At the least, if no commonly used alternative effectively communicates the same functional information, the term that denotes the product is generic.

Id. at 306 (footnote and citations omitted; emphasis added).16 It would appear that, at least with regard to personal injury lawyers, no commonly used alternative to the word "injury" would effectively communicate the same information, because the word "injury" is integrally related to a "distinctive characteristic" of the services being provided.

In recent years, the legal profession has become increasingly specialized. See William H. Rehnquist, Dedicatory Address: The Legal Profession Today, 62 Indiana L.J. 151, 153 (1987); See also Ronald J. Gilson and Robert H. Mnookin, Symposium on the Law Firm as a Social Institution: Sharing among the Human Capitalists, 37 Stanford L.Rev. 313, 328 (1985) (noting "historical pattern of increased specialization in the legal profession"). Many contemporary law firms, including Dranoff-Perlstein, confine their practice exclusively, or nearly so, to cases involving personal injury.17 Within this practice area, competitors' need to use the term "INJURY" to describe their services is manifest. See supra note 12.

In light of the relevant factors identified in Honickman, we hold that personal injury law is properly regarded as its own genus, and that the term "INJURY," as contained in "INJURY-1," is "so commonly descriptive of the name of the [service] that we should consider it generic." See Honickman, 808 F.2d at 298 (citation omitted). Dranoff-Perlstein's competitors may not be precluded from using the term "INJURY" in their advertising, or even as part of their telephone numbers. To do so would be to deny competitors the right to call the practice of personal injury law by its name. See Kellogg Co. v. Nat'l Biscuit Co., 305 U.S. 111, 119, 59 S. Ct. 109, 114, 83 L. Ed. 73 (1938) ("Like every other member of the public, [defendant] was, and remained, free ... to call [its] product by its generic name.").

That does not end our inquiry, however, because the mark for which protection is sought is not "INJURY" but "INJURY-1." According to Professor McCarthy, "[t]he validity of a mark must be determined by looking at the mark as a whole." 1 McCarthy, supra, § 11:10, at 458. However, "[a]dding a suffix to a generic term, such as 'ize' to 'Nylon' to produce NYLONIZE for treating fabrics with a nylon process, will not change the generic nature of the word." Id., § 12:12(C), at 556 (citing Scholler Bros., Inc. v. Bick, Inc., 110 U.S.P.Q. 431 (1956)). Furthermore, as the United States Court of Appeals for the Federal Circuit has stated:

That a particular feature is descriptive or generic with respect to the involved goods or services is one commonly accepted rationale for giving less weight to a portion of a mark.... Without question, the descriptive or generic character of an expression which forms part of both marks under consideration is pertinent to the likelihood of confusion.... Where a descriptive [or generic] term forms part of two or more marks for related products [or services] ... the decisions recognize that the purchasing public has become conditioned to this frequent marketing situation and will not be diverted from selecting what is wanted unless the overall combinations have other commonality. In a sense, the public can be said to rely more on the non-descriptive [or non-generic] portion of each mark.

In re Nat'l Data Corp., 753 F.2d 1056, 1058-59, 1060 (Fed.Cir.1985). See also Keebler Co. v. Murray Bakery Prods., 866 F.2d 1386 (Fed.Cir.1989) (court may properly give less weight to merely descriptive portion of composite marks in analyzing likelihood of confusion); 2 McCarthy, supra, § 23:15(F) (supp.1990 at 44) ("Descriptive or [g]eneric [p]ortion [of composite mark] is [g]iven [l]ess [w]eight on the rationale that the public will look to other portions of the marks and will not be confused unless the other portions are similar.").

In an analogous case, the United States Court of Appeals for the Second Circuit considered a trademark infringement action involving two vaccines, one marketed under the name "HibVAX" and an identical vaccine marketed under the name "HIB-IMUNE." American Cyanamid Corp. v. Connaught Lab., Inc., 800 F.2d 306 (2d Cir.1986). Both vaccines were used to immunize children against Haemophilus influenzae type b diseases, also known by the generic names "H-FLU" and "Hib." Id. at 307.

In analyzing the allegations of infringement, the court first recognized the principle that "[a] trademark holder cannot appropriate generic or descriptive terms for its exclusive use, and a trademark infringement finding thus cannot be based on the use of a generic or descriptive term such as 'Hib.' " Id. at 308.18 The court went on to state:

This principle applies equally to a generic component of a trademark. Although such a component will not necessarily render the trademark invalid, its presence does affect the analysis of whether a competitor's mark containing the same component is likely to create confusion. As a result, because the generic term "Hib" may not be appropriated by [plaintiff] for its exclusive use, any likelihood of confusion between HibVAX and HIB-IMUNE, and any consequent finding of infringement, must be based on a similarity between the suffixes "VAX" and "IMUNE."

Id. at 308. See also 2 McCarthy, supra, § 23:15, at 89 ("If a common portion of the two conflicting marks is a public domain generic word, the emphasis of the enquiry should be upon the confusing similarity of the nongeneric portion, with the ultimate issue determined by the confusing similarity of the total impression of both marks."). Similarly, any finding of infringement here must be based primarily on a likelihood of confusion between the suffixes "1" and "9."19

Some of the cases involving alleged infringement of the mark "COCA-COLA" are useful by way of illustration. The word "COLA" has long been held to be generic and free for all to use. See Coca-Cola Co. v. Snow Crest Beverages, Inc., 162 F.2d 280, 283 (1st Cir.), cert. denied, 332 U.S. 809, 68 S. Ct. 110, 92 L. Ed. 386 (1947); Dixi-Cola Lab., Inc. v. Coca-Cola Co., 117 F.2d 352, 360 (4th Cir.), cert. denied, 314 U.S. 629, 62 S. Ct. 60, 86 L. Ed. 505 (1941). The marks "TAKA COLA,"20 "CLEO COLA,"21 and "CUP-O-COLA"22 have been held confusingly similar to "COCA-COLA." Conversely, the marks "DIXI-COLA,"23 "RONRICOLA,"24 and "POLAR COLA"25 have been held not to be confusingly similar to "COCA-COLA." See 2 McCarthy, supra, § 23:15, at 90.

The existence of secondary meaning and likelihood of confusion are questions of fact. See American Home Prods. Corp. v. Barr Lab., Inc., 834 F.2d 368, 370 (3d Cir.1987). Rather than attempting to resolve these factual questions on the record before us, we will remand the case to the district court for a determination of these issues. If it finds secondary meaning,26 the district court should consider the likelihood of confusion between the two marks in their entireties, with the emphasis of the inquiry on the non-generic portions of the disputed marks. See 2 McCarthy, supra, § 23.15, at 89.

Likelihood of confusion exists " 'when the consumers viewing the mark would probably assume that the product or service it represents is associated with the source of a different product or service identified by a similar mark.' " Ford Motor Co., 930 F.2d at 292 (quoting Scott Paper Co. v. Scott's Liquid Gold, Inc., 589 F.2d 1225, 1229 (3d Cir.1978)). " 'Proof of actual confusion is not necessary; likelihood is all that need be shown.' " Id. (quoting Opticians Ass'n of America v. Independent Opticians of America, 920 F.2d 187, 195 (3d Cir.1990)). As we stated in Ford Motor Co., the likelihood of confusion analysis requires the evaluation of a number of factors, including:

(1) the degree of similarity between the owner's mark and the alleged infringing mark; (2) the strength of owner's mark; (3) the price of the goods [or services] and other factors indicative of the care and attention expected of consumers when making a purchase; (4) the length of time defendant has used the mark without evidence of actual confusion arising; (5) the intent of the defendant in adopting the mark; (6) the evidence of actual confusion; (7) whether the goods [or services], though not competing, are marketed through the same channels of trade and advertised through the same media;27 (8) the extent to which the targets of the parties' sale efforts are the same; (9) the relationship of the goods [or services] in the minds of the public because of the similarity of function ...

Id. at 293 (citing Scott Paper Co., 589 F.2d at 1229).

For the foregoing reasons, we will reverse the order of the district court granting Sklar's motion for summary judgment, and remand for further proceedings consistent with this opinion.

STAPLETON, Circuit Judge, concurring.

I, too, would reverse the judgment of the district court and remand for further proceedings. My instructions to the district court, and my analysis supporting those instructions, would be different from those of the court, however.

If an advertisement does nothing more than instruct a reader to call 465-8791, this gives rise to no trademark or service mark protection under the Lanham Act or the common law of trademarks. The same is true if an ad does nothing more than tell a reader to call INJURY-1. As the court's opinion recognizes, such protection exists only when a mark is being used to identify the source of goods or services. Thus, a mnemonic that is utilized for no other purpose than to help a potential client remember a telephone number is not entitled to trademark protection.

Nevertheless, the plaintiff in this case has used the mark INJURY-1 in printed form as an identification of the source of the legal services plaintiff offers, and to that extent, I agree with the court that the Lanham Act and the common law of trademarks are implicated. I further agree with the court's statement at the beginning of its opinion, as contrasted with its later analysis, indicating that the memory-assisting function of a mnemonic is irrelevant to the issue of the validity of a mark.

Finally, I agree with the court that INJURY-1 is neither arbitrary nor suggestive when used to identify a source of legal services for persons who have suffered personal injury. Though the issue is a close one, I am persuaded that that mark is descriptive of such services in a manner sufficiently direct to foreclose its characterization as a suggestive service mark.

While I am in agreement with the court's opinion in the above respects, I am unable to join it. To begin with, I think it fundamental that the validity of a trade or service mark must be determined by considering the mark as a whole, not by dissecting and analyzing its component parts. As the Supreme Court has had occasion to observe:

"The commercial impression of a trademark is derived from it as a whole, not from its elements separated and considered in detail. For this reason, it should be considered in its entirety...."

Estate of P.D. Beckwith, Inc. v. Commissioner of Patents, 252 U.S. 538, 545-46, 40 S. Ct. 414, 417, 64 L. Ed. 705 (1920); 1 J. Thomas McCarthy, Trademarks and Unfair Competition 458 (1984).

Taking INJURY-1 as a whole, I would find that it is not generic when used to identify a source of legal services for those who have suffered personal injury. It may conceivably indicate to the public a source of such legal services; clearly, I think, it is not taken by the public as the name of the services themselves.

Having determined that the plaintiff's service mark is descriptive and not generic, I would remand for the district court to address, in turn and to the extent necessary, the issues of the existence of secondary meaning,1 the likelihood of confusion,2 and the extent and appropriateness of the various available remedies.