Electronic calculator

Details Electronic calculator Electronic calculator

1988-06-14

1991-06-25

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

D18 6

Patent

active

D03177777

REFERENCES:
patent: D263602 (1982-03-01), Yoshioka et al.
patent: D269624 (1983-07-01), Sakata
patent: D270646 (1983-09-01), Sakata
patent: D273393 (1984-04-01), Sakamoto
patent: D273502 (1984-04-01), Sakata
patent: D273593 (1984-04-01), Sakamoto
patent: D275769 (1984-10-01), Yamada
patent: D276242 (1984-11-01), Sakamoto
patent: D284200 (1986-06-01), Hayashi
patent: D287139 (1986-12-01), Hayashi
patent: 4507745 (1985-03-01), Agrawal
Design News, 7/7/86; p. 105; Casio fx-7000G Scientific Calculator.

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