Printing and office machinery – Typewriter or calculator – Calculator
Patent
1984-11-19
1986-09-09
Zarfas, Louis S.
Printing and office machinery
Typewriter or calculator
Calculator
Patent
active
D02855755
REFERENCES:
patent: D233154 (1974-10-01), Saito
patent: D255246 (1980-06-01), Yoshioka et al.
patent: D279108 (1985-06-01), Sawada
Sharp Corporation
Zarfas Louis S,.
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