Teaching aid

Details Teaching aid Teaching aid

2007-03-20

2007-03-20

Delehanty, Robert A. (Department: 2914)

Office supplies; artists and teachers materials

Teaching material

Design Patent

active

29221733

CLAIM:
The ornamental design for teaching aid, as shown and described.

REFERENCES:
patent: D265100 (1982-06-01), Oettinger
patent: D332803 (1993-01-01), Forslund
patent: D347024 (1994-05-01), Rabus
patent: D355216 (1995-02-01), Grant
patent: D415206 (1999-10-01), Gaines
patent: D432174 (2000-10-01), Stevens et al.
patent: D461205 (2002-08-01), Murray
patent: D468441 (2003-01-01), Pham
patent: D480754 (2003-10-01), Berger
patent: D486183 (2004-02-01), DeMaison
patent: D498792 (2004-11-01), Toniolo

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