Demonstrator of optical phenomena in a case

Details Demonstrator of optical phenomena in a case Demonstrator of optical phenomena in a case

2007-08-21

2007-08-21

Zarfas, Louis (Department: 2914)

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

Design Patent

active

29270455

CLAIM:
The ornamental design for a demonstrator of optical phenomena in a case, as shown and described.

REFERENCES:
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patent: D216364 (1969-12-01), Benz
patent: D243603 (1977-03-01), Salsgiver
patent: D270073 (1983-08-01), Morey
patent: D292932 (1987-11-01), McGinley
patent: D309753 (1990-08-01), Kagelmann-Holtz et al.
patent: 4959819 (1990-09-01), Haczewski, Jr.
patent: D393815 (1998-04-01), Johnson et al.
patent: D405114 (1999-02-01), Hossfeld et al.
patent: D512338 (2005-12-01), Hannon
patent: D531672 (2006-11-01), Hannon

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