Desk-top electronic calculator

Details Desk-top electronic calculator Desk-top electronic calculator

1983-12-05

1986-12-30

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02875071

REFERENCES:
patent: D273200 (1984-03-01), Sakata
patent: D282854 (1986-03-01), Yoshioka et al.
patent: 4086451 (1978-04-01), Boulanger
patent: 4558427 (1985-12-01), Takeuchi et al.
American Express Card Calculator Flyer.
Hong Kong Enterprise 5/1981, p. 303-Brinlock Abacus 8000 Calculator at top.

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