Electronic calculator

Details Electronic calculator Electronic calculator

1987-05-19

1990-08-21

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03100952

REFERENCES:
patent: D243535 (1977-03-01), Ikeda
patent: D245108 (1977-07-01), Pemberton
patent: D262140 (1981-12-01), Yamagami et al.
patent: D263590 (1982-03-01), Fukushima et al.
patent: D269277 (1983-06-01), Yoshioka et al.
patent: D269356 (1983-06-01), Yoshioka et al.
Evans Catalog; 1980/81; p. 230; #5-Sharp Sensor Touch and #8-Sharp 8-Digit.
Hong Kong Enterprise; 3/1986; p. 207.

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