Re: Have you seen these? *LINK*

Some info:
The following excerpts pertain to original copyrights, which of course can be renewed.
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Copyright Law of the United States of America
302. Duration of copyright: Works created on or after January 1, 1978
In General. — Copyright in a work created on or after January 1, 1978, subsists from its creation and, except as provided by the following subsections, endures for a term consisting of the life of the author and 70 years after the author's death.
304. Duration of copyright: Subsisting copyrights
(a) Copyrights in Their First Term on January 1, 1978. —
(1)(A) Any copyright, in the first term of which is subsisting on January 1, 1978, shall endure for 28 years from the date it was originally secured.