United States Patent 4,047,012
General Purpose Calculator Having Factorial Capability
Sept. 6, 1977
Inventors:
- Peter D. Dickinson, Monte Sereno, Calif.
- Thomas E. Osborne, San Francisco, Calif.
- France Rode, Los Altos, Calif.
- Allen J. Baum, Los Altos, Calif.
- David S. Cochran, Palo Alto, Calif.
- Chung C. Tung, Santa Clara, Calif.
Assignee: Hewlett-Packard Company, Palo Alto, Calif.
Appl. No.: 566,631
Filed: Apr. 8, 1975
Abstract:
The battery powered hand-held calculator for performing the arithmetic,
trigonometric and logarithmic functions disclosed herein includes a factorial
function which conveniently calculates factorials of positive integers.
2 Claims, 3 Drawing Figures
An image of first page of this patent is
available (approximately 41 Kbytes).
It is a TIFF class F file at 300 DPI resolution using ITU-T Group 4 Facsimile
(T.6) coding.
Eric's notes:
This patent relates to the HP-45.
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Last updated July 17, 1995
Copyright 1995 Eric Smith
eric@brouhaha.com
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