Combined electronic calculator and checkbook

Details Combined electronic calculator and checkbook Combined electronic calculator and checkbook

1981-02-04

1984-06-05

Word, George P.

Printing and office machinery

Typewriter or calculator

Calculator

D 3 56, D19 11, D19 26

Patent

active

D02741792

REFERENCES:
patent: D241381 (1976-09-01), Garnier
patent: D246205 (1977-10-01), Lewis
patent: D258704 (1981-03-01), Kobayashi
patent: 3145034 (1964-08-01), Campbell
patent: 4222109 (1980-09-01), Siwula
patent: 4224675 (1980-09-01), Pinkerman
patent: 4225157 (1980-09-01), Hamacher

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