KITE, Chief Justice.
[¶ 1] The United States Court of Appeals for the Federal Circuit certified a question to us regarding the validity of an assignment of intellectual property rights given by Yale Preston to Marathon Oil Company without any additional consideration other than continued at-will employment.
[¶ 2] The certified question is:
Our answer to the question is "yes," continuation of at-will employment is sufficient consideration for an agreement requiring assignment of intellectual property.
[¶ 3] The certification order contains the following statement of facts relevant to the question certified:
(footnote in original and record citation omitted).
[¶ 4] W.R.A.P. 11 governs certified questions. Rule 11.01 provides that we may answer a question of law "which may be determinative of the cause" pending in the certifying court and "concerning which it appears there is no controlling precedent" from this Court. "[Q]uestions of the application of the law, including identification of the correct rule, are considered de novo." Pinnacle Bank v. Villa, 2004 WY 150, ¶ 5, 100 P.3d 1287, 1289 (Wyo.2004), quoting EOG Resources, Inc. v. State, 2003 WY 34, ¶ 7, 64 P.3d 757, 759 (Wyo.2003). See also, Prokop v. Hockhalter, 2006 WY 75, ¶ 6, 137 P.3d 131, 133 (Wyo.2006).
[¶ 5] It is helpful to start our analysis of the certified question with a review of the general rights of an employee and an employer to intellectual property conceived by the employee during the term of employment.
19 Williston on Contracts, § 54:20 (4th ed. 2001). See also, University Patents, Inc. v. Kligman, 762 F.Supp. 1212, 1219 (E.D.Pa. 1991). The public policy underlying this general rule is to encourage individuals to exercise their inventive powers. Banner Metals, Inc. v. Lockwood, 178 Cal.App.2d 643, 3 Cal.Rptr. 421, 428 (1960). However, "[i]f an employee's job duties include the responsibility for inventing or for solving a particular problem that requires invention, any invention created by that employee during the performance of these responsibilities belongs to the employer. . . ." 19 Williston on Contracts, § 54:20. Thus, typically, an employee who is not hired to invent is the owner of any invention discovered during employment.
[¶ 6] Nevertheless, when an employee who was not hired to invent does invent something as part of his work duties, the employer is given a "shop right" to use the invention. 27 Am.Jur.2d Employment Relationship § 188 (2011) explains:
[¶ 7] Mr. Preston was hired by Marathon as a relief pumper and there is no indication that his specific job duties included inventing the baffle system. So, under the general rules (without considering the impact of the assignment), Mr. Preston would be the owner of his invention and Marathon would be entitled to use the invention under the "shop right" principle.
[¶ 8] Mr. Preston, however, signed the April 2001 Employee Agreement, wherein he agreed to "promptly disclose to MARATHON and does hereby assign to MARATHON all Intellectual Property. . . ."
[¶ 9] In Wyoming, we have recognized that all employment occurs by either express or implied contract. Wilder v. Cody
[¶ 10] This legal and factual background sets up our current inquiry—whether an at-will employee's assignment of intellectual property rights to his employer must be accompanied by additional consideration, beyond the continuation of his employment, to be enforceable. Other jurisdictions have addressed that issue, with mixed results.
[¶ 11] Mr. Preston points to Hewett v. Samsonite Corp., 32 Colo.App. 150, 507 P.2d 1119 (1973) and Harsco Corp. v. Zlotnicki, 779 F.2d 906 (3d.Cir.1985) as support for his argument that additional consideration is required. Hewett was employed by Samsonite as "foreman of the model shop in which prototype models were fabricated from designs drawn by Samsonite's design and engineering department." Id. at 1120. Although he was not hired to invent, Hewett invented three products, and Samsonite required him to assign the patent rights. Hewett contended that the assignment was not valid because no separate consideration was given by Samsonite for it. Samsonite argued that, by allowing Hewett to continue working for the company, "sufficient consideration was given to make the assignment binding." Id. at 1121. The Colorado Court of Appeals held that continued employment was not sufficient consideration for the patent assignment, rendering it invalid. Hewett, therefore, owned the inventions, subject to Samsonite's shop rights. Id. at 1121-22.
[¶ 12] In Harsco, Zlotnicki worked for Harsco as a staff engineer. He conceived a new invention as part of his work duties, and Harsco required him to assign his patent rights to it. Harsco, 779 F.2d at 907-08. The Third Circuit applied Pennsylvania law and upheld the assignment, but interpreted the assignment agreement as containing a promise by Harsco to employ Zlotnicki for a reasonable time. Id. at 910-11. That case, therefore, arguably stands for the proposition that additional consideration beyond continued at-will employment is required to support an assignment of patent rights to the employer.
[¶ 13] Marathon directs us to other cases which hold to the contrary—continued employment is sufficient consideration to support an agreement to assign intellectual property. In Goodyear Tire & Rubber Co. v. Miller, 22 F.2d 353, 354-56 (9th Cir.1927), the Ninth Circuit Court of Appeals held that continued employment was sufficient consideration to support a patent assignment agreement. The court noted that at the time the assignment was presented to Miller, Goodyear was under no obligation to continue to employ him. Goodyear, therefore, had the same right to make the assignment agreement a condition of retention as it would have had to impose it as a condition for hiring him in the first place. The court observed that Goodyear did not bind itself to employ Miller for any stipulated period and Miller did not agree to remain for any designated length of time. Thus, both parties were on the same footing and "their rights and obligations were reciprocal." Id. at 355. See also, Hebbard v. American Zinc, Lead & Smelting Co., 161 F.2d 339, 345 (8th Cir. 1947) (refusing to rescind contracts for assignment
[¶ 14] We are, therefore, faced with a split of authority on the question of whether additional consideration is required to support a post-employment assignment of intellectual property. Preston argues that our decision in Hopper v. All Pet Animal Clinic, Inc., 861 P.2d 531 (Wyo.1993) presents an analogous situation and obligates us to rule that consideration in addition to continued at-will employment is necessary to support a post-employment assignment of intellectual property rights.
[¶ 15] Hopper involved a covenant not to compete given by an employee after commencement of her employment. In analyzing the effectiveness of the non-compete provision, we looked at public policy which generally disfavors such agreements.
Hopper, 861 P.2d at 539. Thus, we closely scrutinize covenants not to compete, employing a rule of reason analysis, to ensure there is a proper balance between the competing interests of the employer and employee. Id. "A valid and enforceable covenant not to compete requires a showing that the covenant is: (1) in writing; (2) part of a contract of employment; (3) based on reasonable consideration; (4) reasonable in durational and geographical limitations; and (5) not against public policy." Id. at 540 (citations omitted).
[¶ 16] Addressing the requirement that a covenant not to compete be supported by "reasonable consideration," we held that public policy favored separate consideration and continued at-will employment was not sufficient consideration to support such an agreement. Our ruling was based, in part, on the sanctity of the right to earn a living. We stated "the employee rarely `bargains for' continued employment in exchange for a potentially onerous restraint on the ability to earn a living." Id. at 541, quoting Howard A. Specter & Matthew W. Finin, Individual Employment Law and Litigation § 8.02 (1989).
[¶ 17] We explained the potential ramifications if we were to rule that continued at-will employment was sufficient consideration for an agreement not to compete:
Hopper, 861 P.2d at 541-42.
[¶ 18] Mr. Preston maintains that the same rule should apply to agreements to assign intellectual property, i.e., separate consideration should be required. Case law from other jurisdictions discusses the differences between covenants not to compete and agreements to assign intellectual property. In MAI Basic Four, Inc. v. Basis, Inc., 880 F.2d 286 (10th Cir.1989), for example, the Tenth Circuit Court of Appeals interpreted New Mexico law and recognized that covenants not to compete are generally characterized as restrictive covenants; however, patent waiver agreements between employers and employees do not fall within that definition and must, therefore, be treated differently. The court remarked that, with patent assignment agreements, employees remain free to work for "whomever they wish, wherever they wish, and at whatever they wish, subject only to . . . the requirement that [the employees] assign to [the employer] any work product relating to [the employer's] business that was developed by [the employees] while they were employed by the [employer] or shortly thereafter." Id. at 287-88. Because of those differences, unlike covenants not to compete, agreements to assign patents do not have to be supported by separate consideration. Id.
[¶ 19] Harsco, which in some aspects supports Mr. Preston's position that additional consideration is required for patent assignment agreements, specifically stated that non-compete agreements are different than patent assignment agreements. "[R]estrictive covenant [non-competition] cases differ from assignments of patent rights because restrictive covenants hamper a person's ability to earn a living, whereas patent assignments affect only property rights to patents." Harsco, 779 F.2d at 910. The court, therefore, held that the rationale which requires additional consideration for non-competition agreements does not apply to patent assignment agreements. Id.
[¶ 20] We agree that there is a fundamental difference between non-competition agreements and intellectual property assignment agreements. The concerns with restraints on trade which attend non-competition agreements simply are not present for intellectual property assignment agreements. That is particularly obvious here, where Mr. Preston only agreed to assign the rights to inventions that he made or conceived while employed by Marathon. The agreement did not limit his right to earn a living, or, for that matter, his rights to inventions that were not related to Marathon's business or were not created with the use of Marathon's confidential information, equipment, supplies or facilities. The assignment agreement also did not affect Mr. Preston's rights to inventions he created after his employment with Marathon was over, although intellectual property conceived or made by him within one year after termination was "presumed to have been made or conceived during" his employment. Given that the intellectual property assignment agreement did not affect Mr. Preston's right to earn a living or otherwise impose an improper restraint on trade, Hopper does not govern our decision in this case.
[¶ 21] We must, consequently, return to the basic precepts of at-will employment. As we mentioned earlier, at-will employment is terminable by either party at any time for any reason or no reason at all. Because of its terminable nature, either party has the power to modify the terms of the employment at any time, and the other party may either accept the new terms and carry on with the employment relationship or reject the new terms and terminate the relationship. The policies behind at-will employment were explained in Townsend v. Living Centers Rocky Mountain, Inc., 947 P.2d 1297, 1299 (Wyo.1997):
[¶ 22] We believe that the stability of the business community is best served by ruling, consistent with our at-will employment jurisprudence, that no additional consideration is required to support an employee's post-employment execution of an agreement to assign intellectual property to his employer. If the employee does not agree to that modification of the terms of his employment, he can terminate the relationship without any penalties.
[¶ 23] The answer to the certified question is, therefore, "yes."