Teaching apparatus block

Details Teaching apparatus block Teaching apparatus block

2003-05-08

2004-10-12

Sincavage, Joel (Department: 2913)

Office supplies; artists and teachers materials

Teaching material

Design Patent

active

D0497182

CLAIM:
The ornamental design for a teaching apparatus block, as shown and described.

REFERENCES:
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patent: 1836870 (1931-12-01), Quer
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patent: 4602908 (1986-07-01), Kroeber
patent: 4719738 (1988-01-01), Lee
patent: 4731279 (1988-03-01), Isshiki
patent: D310421 (1990-09-01), Nauseda et al.
patent: D338243 (1993-08-01), Underwood
patent: 6206701 (2001-03-01), Kohlberg

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