Expandable pen

Details Expandable pen Expandable pen

2007-10-09

2007-10-09

Albert, Elizabeth A. (Department: 2913)

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

Design Patent

active

29246268

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

REFERENCES:
patent: D80362 (1930-01-01), Cuthbert et al.
patent: D439613 (2001-03-01), Ham
patent: 6273627 (2001-08-01), Mittersinker et al.
patent: D453792 (2002-02-01), Tung
patent: D466934 (2002-12-01), Schung
patent: D477025 (2003-07-01), Morrow
patent: D485576 (2004-01-01), Burden et al.
patent: D504916 (2005-05-01), Yeh
patent: 7180509 (2007-02-01), Fermgard et al.
patent: D541858 (2007-05-01), Yeh

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