1. Dutfield and Suthersanen, Global Intellectual Property Law. Edward Elgar Publishing; 2008.
2. Patel SR, Caldamone AA. The history of urethral catheterization. Med Health RI. 2004;87:240–2.
3. Herman JR. A journey through the retrospectroscope. Hagerstown, MD: Harper & Row Publishers; 1975. p. 35–40.
4. Raiche v. Foley F.2d 497 (C.C.P.A., 1940).
5. U.S.C. § 101.