Harris, Carl H. "Ice Cube Tray." U. S. Patent No. 4366941. Washington, DC: United States Patent and Trademark Office, 1981. http://www.uspto.gov/patft/index.html (9 January 2008)

Harris, Carl H. "Ice Cube Tray." U. S. Patent No. 4366941. Washington, DC: United States Patent and Trademark Office, 1981. http://www.uspto.gov/patft/index.html (9 January 2008)

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Harris, Carl H. "Ice Cube Tray." U. S. Patent No. 4366941. Washington, DC: United States Patent and Trademark Office, 1981. http://www.uspto.gov/patft/index.html (9 January 2008)

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http://vocab.getty.edu/aat/source/2000048683
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Harris, Carl H. "Ice Cube Tray ...... ft/index.html (9 January 2008)
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Harris, Ice Cube Tray (1981)
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