Electronic calculator

Details Electronic calculator Electronic calculator

1993-07-08

1995-01-03

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

D14100, D18 2

Patent

active

D03540758

REFERENCES:
patent: D317780 (1991-06-01), Arai
patent: D325571 (1992-04-01), Sakaguchi et al.
patent: D334020 (1993-03-01), Takahata
patent: D341573 (1993-11-01), Sakaguchi et al.
patent: D345732 (1994-04-01), Sakaguchi et al.

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