Combined pocket calculator and telephone directory

Details Combined pocket calculator and telephone directory Combined pocket calculator and telephone directory

1990-01-02

1992-02-04

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Combined

D18 7

Patent

active

D03236706

REFERENCES:
patent: D155026 (1949-08-01), Nein
patent: D198957 (1964-08-01), Hegemann
patent: D248994 (1978-08-01), Ikeda
patent: D258891 (1981-04-01), Kitai et al.
patent: D300227 (1989-03-01), Noguchi
patent: D314213 (1991-01-01), Bishop
patent: 3987565 (1976-10-01), Mori
patent: 4275887 (1981-06-01), Tateyama
patent: 4800584 (1989-01-01), Kitanishi
patent: 4939514 (1990-07-01), Miyazaki

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