Electronic pocket calculator

Details Electronic pocket calculator Electronic pocket calculator

1976-12-01

1978-03-14

Lucas, Susan J.

Printing and office machinery

Printing equipment

Hand held or manipulated

D1802

Patent

active

D02475227

REFERENCES:
patent: D221227 (1971-07-01), Dietrich et al.
patent: D235209 (1975-05-01), Baughman
Office Products, Apr. 1974, p. 23, Casio Memory 8 Calculator.
Office Products, Feb. 1975, p. 68, Beta 326/392 programmable scientific display calculator.

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