The field of intellectual property as treated in this paper encompasses mental products of industrial importance: inventions or discoveries, literary or artistic works, trade secrets,and distinguishing trademarks or trade names used in commerce. Each of these is characterized by mental activity followed by embodiment in some concrete form. Protection in a measure for the originator is found both in the statutes and in common law.
Robert J. Fay, Concrete Forms of Intellectual Property, 9 Clev.-Marshall L. Rev. 2 (1960)