Sawyer, Gerald F. "Suspended Ornament for Lamp Finial." U. S. Patent number: 5611618. Washington, DC: United States Patent and Trademark Office, 1995. http://www.uspto.gov/patft/index.html (8 May 2013).

Sawyer, Gerald F. "Suspended Ornament for Lamp Finial." U. S. Patent number: 5611618. Washington, DC: United States Patent and Trademark Office, 1995. http://www.uspto.gov/patft/index.html (8 May 2013).