Patent protection is territorial in nature -- meaning a US patent protects patent rights within the United States and not other countries.
The second part of the question (the letters and numbers) looks to be a categorization of the type of invention. Inventions are given specific classifications (so a spoon will be in a different classification than an engine …). There are many types of inventions so there are many types of classifications. The classifications can help with patent searching.
Consult with a patent attorney privately to analyze your specific case and facts -- so your rights are fully protected.
This answer includes generalizations and there are many caveats. This answer does not form an attorney client relationship.
safe deposit box contents
a family member recently passed away in Connecticut, leaving a safe deposit box that the widow (second spouse) was not on the signature card for. How do the surviving children get access to that box? We know the deceased had it (____ told us) but we don't know which bank. We've tried calling banks, but they won't tell us whether they have a box in the deceased's name or not. What happens now?
