CFA: 3:55 P.M. - 10/25
Anthony Biller, Esquire, gives us a rundown on copyright law. A copyright protects original works of authorship. "Original," in this sense, means that the work originated in the author. "Works," in this sense, exclude concepts or ideas. It only applies to the expression of concepts or ideas.
Copyright does not extend to public domain. Public domain includes events in history, objective facts, or historical documents. Any work prior to 1923 is considered public domain.
Individual copyrights extend 70 years after the author's death. They do not give you a monoply ownership over the work, they only protect you from others copying your specific work.