Combined typewriter and graphmaker

Details Combined typewriter and graphmaker Combined typewriter and graphmaker

1985-01-25

1987-07-07

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Patent

active

D02907143

REFERENCES:
patent: D159977 (1950-09-01), Gordenier
patent: D278404 (1985-04-01), Morishita
patent: D282374 (1986-01-01), Maekawa et al.
patent: D282551 (1986-02-01), Nibley et al.

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