Triangular pen

Details Triangular pen Triangular pen

2006-12-12

2006-12-12

Albert, Elizabeth A. (Department: 2913)

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

Design Patent

active

D0533592

CLAIM:
The ornamental design for a triangular pen, as shown.

REFERENCES:
patent: 2608953 (1952-09-01), Kollsman
patent: D177560 (1956-05-01), Ensign et al.
patent: D319845 (1991-09-01), Grotsch et al.
patent: D323186 (1992-01-01), Clark et al.
patent: D342546 (1993-12-01), Song
patent: D418541 (2000-01-01), Mayer
patent: D450768 (2001-11-01), Keda
patent: D463822 (2002-10-01), Keda
patent: D474241 (2003-05-01), Hasegawa
patent: D484912 (2004-01-01), Briggl
patent: D509853 (2005-09-01), Anand

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