Desk-top electronic calculator

Details Desk-top electronic calculator Desk-top electronic calculator

1985-06-26

1987-05-26

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02900181

REFERENCES:
patent: D247522 (1978-03-01), Woithe
patent: D256695 (1980-09-01), Yamagami
patent: D273307 (1984-04-01), Yamagami
patent: D282662 (1986-02-01), Scheid et al.
patent: D284771 (1986-07-01), Tamada et al.

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