Electronic calculator with telephone dialer

Details Electronic calculator with telephone dialer Electronic calculator with telephone dialer

1987-06-04

1990-06-12

Dunkins, Bruce W.

Printing and office machinery

Typewriter or calculator

Combined

D18 7

Patent

active

D03085368

REFERENCES:
patent: D301885 (1989-06-01), Takemata et al.
patent: 4272655 (1981-06-01), MacKenzie et al.
patent: 4648125 (1987-03-01), Brown
Hong Kong Enterprise; Jan. 1985, p. 183.

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