Electronic calculator

Details Electronic calculator Electronic calculator

2007-07-17

2007-07-17

Spear, Robert M. (Department: 2913)

Printing and office machinery

Typewriter or calculator

Calculator

Design Patent

active

29245571

CLAIM:
The ornamental design for an electronic calculator, as shown.

REFERENCES:
patent: D261773 (1981-11-01), Ichikawa et al.
patent: D266855 (1982-11-01), Yoshioka et al.
patent: D307032 (1990-04-01), Sawada et al.
patent: D317458 (1991-06-01), Sawada et al.
patent: D330907 (1992-11-01), Burke
patent: D362266 (1995-09-01), Matsuda
patent: D438238 (2001-02-01), Chu et al.
patent: D464989 (2002-10-01), Bodum
patent: D466147 (2002-11-01), Chan
patent: D467245 (2002-12-01), Hoornaert et al.
patent: D501499 (2005-02-01), Matsuda
patent: D529536 (2006-10-01), Oas

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