Printing and office machinery – Typewriter or calculator – Calculator
Patent
1982-03-24
1984-03-27
Zarfas, Louis S.
Printing and office machinery
Typewriter or calculator
Calculator
Patent
active
D02731991
REFERENCES:
patent: D228915 (1973-10-01), Ishii
patent: D233153 (1974-10-01), Saito
patent: D233442 (1974-10-01), Saito
patent: D250430 (1978-11-01), Nishiguchi
Sharp Corporation
Zarfas Louis S,.
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