Slide frame for calculator or the like

Details Slide frame for calculator or the like Slide frame for calculator or the like

1977-06-20

1980-01-29

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

D1999

Patent

active

D02540789

REFERENCES:
patent: D227408 (1973-06-01), Hotchkiss
patent: 2179531 (1939-11-01), Trapnell
patent: 2542834 (1951-02-01), Peurozet
patent: 3106029 (1963-10-01), Desmond

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