Calculator

Details Calculator Calculator

1988-01-19

1991-02-19

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

D18 6

Patent

active

D03147860

REFERENCES:
patent: D255245 (1980-06-01), Yoshioka et al.
patent: D287584 (1987-01-01), Huang

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