Printing and office machinery – Typewriter or calculator – Calculator
Patent
1977-11-21
1979-08-28
Lucas, Susan J.
Printing and office machinery
Typewriter or calculator
Calculator
D1801
Patent
active
D02527731
REFERENCES:
patent: D232944 (1974-09-01), Maeda et al.
patent: D240634 (1976-07-01), Hazama
patent: D240736 (1976-07-01), Pemberton
Commodore "Minuteman 1" Flyer, #C10147, Electronic Calculator.
Lawrence William J.
Sulek Eugene J.
Grossman Rene E.
Lucas Susan J.
Texas Instruments Incorporated
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