Calculator

Details Calculator Calculator

1995-08-28

1996-09-24

Holtje, Nelson C.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D03740293

REFERENCES:
patent: D232834 (1974-09-01), Yamagami
patent: D248419 (1978-07-01), Beitler et al.
patent: D276920 (1984-12-01), Peroni
patent: D307890 (1990-05-01), Kim
patent: D314207 (1991-01-01), Suzuki

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