Freeman, Mike, Stuart K. Morgan, and Mike Romm. "Wiring distribution system and devices for building." U. S. Patent number: 5366388. Washington, DC: United States Patent and Trademark Office, 1994. http://www.uspto.gov/patft/index.html (16 December 2007).

Freeman, Mike, Stuart K. Morgan, and Mike Romm. "Wiring distribution system and devices for building." U. S. Patent number: 5366388. Washington, DC: United States Patent and Trademark Office, 1994. http://www.uspto.gov/patft/index.html (16 December 2007).