Demonstration device

Details Demonstration device Demonstration device

2007-10-11

2009-08-11

Nelson, T. Chase (Department: 2914)

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

Design Patent

active

D0598051

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

REFERENCES:
patent: D295054 (1988-04-01), Allen
patent: D321370 (1991-11-01), Curtis
patent: D351632 (1994-10-01), Mitchell
patent: D414815 (1999-10-01), McDonald
patent: D429472 (2000-08-01), Austin
patent: D466825 (2002-12-01), Ettridge et al.
patent: D539373 (2007-03-01), Cook
patent: D546391 (2007-07-01), Peters, Jr.

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