Feist Publications, Inc. v. Rural Telephone Service Co.

499 US 340, 111 S. Ct. 1282, 113 L. Ed. 2d 358 - Supreme Court, 1991 - Google Scholar
… elements of a work for which copyright is not available: "In no case does copyright protection
for an original work of authorship extend to any idea, procedure, process, system, method of …