Electronic calculator

Details Electronic calculator Electronic calculator

1986-07-10

1989-09-19

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03035409

REFERENCES:
patent: D258740 (1981-03-01), Matsumoto
patent: D269353 (1983-06-01), Yokoyama
patent: D284388 (1986-06-01), Hampf
patent: D285311 (1986-08-01), Sawada
patent: D292222 (1987-10-01), Stern
patent: 4491049 (1985-01-01), Mizuta
HFD-Retailing Home Furnishings, Jan. 1, 1979, Section Two, p. 32, Craig M-100.
W. Bell Catalog, 1984, p. 275, #J.

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