Case for a printing calculator

Details Case for a printing calculator Case for a printing calculator

1978-02-21

1980-01-15

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1801

Patent

active

D02539551

REFERENCES:
patent: D227473 (1973-06-01), Lampel
patent: D233442 (1974-10-01), Saito
patent: D235451 (1975-06-01), Ishikawa
patent: D250293 (1978-11-01), Lawrence

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