Calculators

Historical Document · 1989

US Patent 4,845,652: Generic Equation Solver Interface for Solving Mathematical Equations (Hewlett-Packard)

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Hewlett-Packard's patent on the menu-key equation solver: priority 29 May 1986, granted 4 July 1989.

Author
Christopher M. Bunsen
Year
1989
Type
Historical Document
Credit
US Patent and Trademark Office; via Google Patents.

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US Patent 4,845,652: Generic Equation Solver Interface for Solving Mathematical Equations (Hewlett-Packard)