Electronic calculator

Details Electronic calculator Electronic calculator

1990-09-19

1992-06-30

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

D14100

Patent

active

D03274942

REFERENCES:
patent: D260776 (1981-09-01), Yoshioka et al.
Hong Kong Enterprise; Mar. 1989; p. 568, #810 Beige Calculator middle top of page.
Calculators by Unisonic Brochure; #CX1510 top of page.

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