Calculator

Details Calculator Calculator

2007-12-25

2007-12-25

Spear, Robert M. (Department: 2913)

Printing and office machinery

Typewriter or calculator

Calculator

Design Patent

active

29277574

CLAIM:
The ornamental design for a calculator, as shown and described.

REFERENCES:
patent: D307032 (1990-04-01), Sawada et al.
patent: D309623 (1990-07-01), Sawada et al.
patent: D317458 (1991-06-01), Sawada et al.
patent: D368111 (1996-03-01), Komatsu et al.
patent: D377190 (1997-01-01), Matsuda
patent: D383773 (1997-09-01), Tamaki et al.
patent: D408440 (1999-04-01), Matsuda et al.
patent: D438238 (2001-02-01), Chu et al.
patent: D475736 (2003-06-01), Hsu
patent: D501499 (2005-02-01), Matsuda
patent: D533894 (2006-12-01), Chan

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