Calculator or similar article

Details Calculator or similar article Calculator or similar article

1987-11-25

1990-04-17

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03072908

REFERENCES:
patent: D190374 (1987-06-01), Yubisui et al.
patent: D250430 (1978-11-01), Nishiguchi
patent: D261398 (1981-10-01), Hirata et al.
patent: D273199 (1984-03-01), Sawada
patent: D279106 (1985-06-01), Sawada et al.
patent: D284869 (1986-07-01), Kurihara
patent: D294280 (1988-02-01), Yubisui et al.

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