Printing and office machinery – Typewriter or calculator – Calculator
Patent
1983-05-19
1985-06-04
Zarfas, Louis S.
Printing and office machinery
Typewriter or calculator
Calculator
D18 2
Patent
active
D02791102
REFERENCES:
patent: D228190 (1973-08-01), Link
patent: D249390 (1978-09-01), Ohie
patent: D257990 (1981-01-01), Hirata et al.
patent: D259349 (1981-05-01), Hirata et al.
Sharp Corporation
Zarfas Louis S,.
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