Goodman, et al. “Key Rack.” U.S. Patent number D643,663 S. Washington DC: United States Patent and Trademark Office, 2004. http://www.uspto.gov/patft/index.html (1 May 2013).

Goodman, et al. “Key Rack.” U.S. Patent number D643,663 S. Washington DC: United States Patent and Trademark Office, 2004. http://www.uspto.gov/patft/index.html (1 May 2013).