U.S. Supreme Court
Baker v. Selden, 101 U.S. 99 (1879)
Baker v. Selden
101 U.S. 99
1. A claim to the exclusive property in a peculiar system of bookkeeping cannot, under the law of copyright, be maintained by the author of a treatise in which that system is exhibited and explained.
2. The difference between a copyright and letters patent stated and illustrated.
The facts are stated in the opinion of the Court.