Calculator

Details Calculator Calculator

1987-01-08

1990-07-31

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03096270

REFERENCES:
patent: D236269 (1975-08-01), Shu-Keung
patent: D299251 (1989-01-01), Endo et al.

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