Public domain
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The public domain consists of all creative work to which no exclusive intellectual property rights apply. Those rights may have expired, be forfeit, waived or may be inapplicable. Because no one holds
Newton's own copy of his Principia, with hand-written corrections for the second edition
Portraits of United States Presidents, in this case Abraham Lincoln, are in the public domain.
Visual created for Public Domain Day. Features Leonardo da Vinci's Mona Lisa, as it is famously part of the public domain
Copyright Act of 1976
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The Copyright Act of 1976 is a United States copyright law and remains the primary basis of copyright law in the United States, as amended by several later enacted copyright provisions. The Act spells
The first-sale doctrine allows persons other than the copyright owner, such as this used bookstore, to resell copies of works.
Exhibition of copyrighted artwork in a gallery generally does not infringe the public display right. (The paintings in this photograph are in the public domain.)