Quiz machine

Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine

Design Patent

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Design Patent

active

D0449341

CLAIM:
The ornamental design for a quiz machine, as shown and described.

REFERENCES:
patent: D. 345965 (1994-04-01), Hankes
patent: D. 374631 (1996-10-01), Whittaker
patent: D. 442101 (2001-05-01), Kochie
patent: 4764120 (1988-08-01), Griffin et al.
patent: 5842871 (1998-12-01), Cutler et al.
patent: 6065972 (2000-05-01), Doan

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