Case for electronic calculator

Details Case for electronic calculator Case for electronic calculator

1987-10-16

1990-04-17

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03072932

REFERENCES:
patent: D235209 (1975-05-01), Baughman
patent: D236488 (1975-08-01), Fossella
patent: D283138 (1986-03-01), Hamar

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