Calculator casing

Details Calculator casing Calculator casing

1976-09-02

1978-05-16

Lucas, Susan J.

Printing and office machinery

Printing equipment

Hand held or manipulated

D1801

Patent

active

D02479273

REFERENCES:
patent: D227472 (1973-06-01), Hikawa
patent: D240736 (1976-07-01), Pemberton
Office Products, Mar. 1974, p. 121, Model 855, memory calculator.
Office Products, Feb. 1975, p. 54, calculator (bottom).

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