Printing and office machinery – Typewriter or calculator – Calculator
Patent
1983-10-19
1986-01-28
Zarfas, Louis S.
Printing and office machinery
Typewriter or calculator
Calculator
D25 16
Patent
active
D02823756
REFERENCES:
patent: D90405 (1933-08-01), Foehrenbach
patent: D215075 (1969-08-01), Crossland et al.
patent: D221386 (1971-08-01), Babbs et al.
patent: 1108384 (1914-08-01), McTammany
patent: 3181785 (1965-05-01), Laws et al.
patent: 3654709 (1972-04-01), Martin et al.
Veeder Industries Inc.
Zarfas Louis S,.
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