Electronic calculating machine

Details Electronic calculating machine Electronic calculating machine

1976-05-21

1977-03-01

Burke, Wallace R.

Printing and office machinery

Printing equipment

Hand held or manipulated

D1801

Patent

active

D02435357

REFERENCES:
patent: D229065 (1973-11-01), Maeda et al.
patent: D232943 (1974-09-01), Maeda
patent: D236269 (1975-08-01), Shu-Keung
patent: D238493 (1976-01-01), Maeda
Office Products--Dec. 1974, p. 19, Sperry Remington Calculators.

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