Historical Document · 1998

US Patent 5,739,823: Graph Display Devices (Casio)

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Casio's patent on plotting each function in a user-chosen colour: priority 12 August 1994, granted 14 April 1998.

Author

Shunsuke Akaza, Akihiro Handa, Hidekazu Tanaka, Makoto Ozawa, Kazuhiko Arikawa

Year

1998

Type

Historical Document

Credit

US Patent and Trademark Office; via Google Patents.

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