Business record apparatus

Details Business record apparatus Business record apparatus

1977-11-07

1980-01-08

Lucas, Susan J.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02538954

REFERENCES:
patent: 3775752 (1973-11-01), Lorenzo
Datamation, 5-1976, p. 36, SR-60 Programmable Calculator.

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