Combined clipboard and calculator

Details Combined clipboard and calculator Combined clipboard and calculator

1994-05-16

1995-06-06

Thompson, Martie

Office supplies; artists and teachers materials

Office equipment not elsewhere specified

Holder or file

D18 2, D19 83

Patent

active

D03590747

REFERENCES:
patent: D284678 (1986-07-01), Shamoon
patent: D284976 (1986-08-01), Hung
patent: D296220 (1988-06-01), Hung
patent: D318881 (1991-08-01), Chase
patent: D331076 (1992-11-01), Montgomery
patent: D333162 (1993-02-01), Baker
patent: D341626 (1993-11-01), Rosmarin, Jr. et al.
patent: 4153927 (1979-05-01), Owens
patent: 4586730 (1986-05-01), Shulyak
patent: 4892334 (1990-01-01), Sinclair
patent: 5154330 (1992-10-01), Haynes
Brochure distributed by American Inventors Corporation approximately during Aug. 1992.
Handbook of Designs and Devices 1946, see p. 52, #468 circled lower right.

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