The term of protection of copyright varies with the content and subject of the right:
(1) The protection period of the author's right of signature, modification and protection of the integrity of the work is infinite.
(2) The term of protection of the right of publication, the right of use and the right to remuneration of a natural person's work shall be fifty years before and after the author's death. If it is a cooperative work, it ends at 65438+February 3rd 1 50 years after the death of the last deceased author.
(3) The copyright protection period of the works of legal persons or other organizations (except the right of authorship) and the works of posts enjoyed by legal persons or other organizations is 50 years, ending at 65438+February 3 1 day in the 50th year after the first publication of the works. However, if a work is not published within 50 years after its creation, it will no longer be protected by copyright law.
Correct. The term of protection of an invention patent is 20 years, counting from the date of application.
B Correct. The trademark is valid for 10 years, counting from the date of approval of registration.
D Correct, the protection period of appearance patent is 15 years, and that of utility model patent is 10 years.