Bonjour a tous: I have a lot of experience in this! A moment please to clarify some confusion:
Copyright: . A work of art, music, text, books, etc. Fair use doctrine allows republication and copy use if credit is granted to the (C) owner or if the work is modified.
Life is long but not unlimited
Trademark: The words or appearance of a distinctive mark to distinguish uniquelt the product or service eg Coca-Cola and the unique logo. Never expires!
Patent: One definition is new combination of existing components that achieves a new, useful and unexpected result.
See USC 35 for definitions and law.
99.999 % of all patents are worthless, never enforced or licensed.
Notice that patents are regional or national:The USA or EU patent can be enforced if the device or invention is made, sold or used in the region eg USA or EU. BUT is NOT enforceable outside the region, eg in China,
20 yrs validity.
A tiny fraction of patents are very valuable think of Ray DOLBY.
Hope that you find this useful!
Bon Journee,
Jon
PS: since 1970s, we invented, patented Pro Se (no lawyer) seven patents.
One in 1990s was negotiated or litigated 160 times, in my favor.
$ went to lawyers, licensing firms or co inventors!