Printing and office machinery – Typewriter or calculator – Calculator
Patent
1978-12-01
1982-02-02
Zarfas, Louis S.
Printing and office machinery
Typewriter or calculator
Calculator
D1801
Patent
active
D02628902
REFERENCES:
patent: D230405 (1974-02-01), Jinbo
patent: D239836 (1976-05-01), Ikeda
patent: D250293 (1978-11-01), Lawrence
Heiting Leo N.
Marshall, Jr. Robert D.
Sharp Melvin
Texas Instruments Incorporated
Zarfas Louis S,.
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