Calculator or similar article

Details Calculator or similar article Calculator or similar article

1987-12-21

1990-05-01

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03075940

REFERENCES:
patent: D257976 (1981-01-01), Schmidt
patent: D258892 (1981-04-01), Ohie et al.
patent: D273201 (1984-03-01), Sakata
patent: D273393 (1984-04-01), Sakamoto
patent: D279565 (1985-07-01), Forbis et al.

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