Bohunsky, Robert L. "Violin Case." U. S. Patent number: D280359. Washington, DC: United States Patent and Trademark Office, 1985. http://www.uspto.gov/patft/index.html (18 February 2008).

Bohunsky, Robert L. "Violin Case." U. S. Patent number: D280359. Washington, DC: United States Patent and Trademark Office, 1985. http://www.uspto.gov/patft/index.html (18 February 2008).