Combined calculator ruler, and desk tray

Details Combined calculator ruler, and desk tray Combined calculator ruler, and desk tray

1984-03-16

1986-08-12

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Combined

D10 2, D10 71, D18 7, D19 75, D19 77

Patent

active

D02850940

REFERENCES:
patent: D157534 (1950-02-01), Price
patent: D245109 (1977-07-01), Yoshioka
patent: D279381 (1985-06-01), Leung

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