Electronic calculator

Printing and office machinery – Typewriter or calculator – Combined

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Details

D10 71, D19 32, 1801

Patent

active

D04118570

REFERENCES:
patent: D207794 (1967-05-01), Cherrington
patent: D322039 (1991-12-01), Chien
patent: D369178 (1996-04-01), Bedol
patent: D396424 (1998-07-01), Bedol et al.
patent: D397301 (1998-08-01), Bedol et al.
patent: D397302 (1998-08-01), Bedol et al.
patent: D397303 (1998-08-01), Bedol et al.
patent: D398250 (1998-09-01), Dietterich et al.

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