Quizzer toy

Details Quizzer toy Quizzer toy

1981-01-13

1983-10-18

Dunkins, Bruce W.

Office supplies; artists and teachers materials

Teaching material

Sensory feedback, e.g., audio-visual teaching machine

D10 46, D13 12, D17 1, D21 64, D1907

Patent

active

D02710293

REFERENCES:
patent: D142053 (1945-08-01), Wurster
patent: D238497 (1976-01-01), Fossella et al.
patent: D243534 (1977-03-01), Blesch
patent: D245024 (1977-07-01), Genin
patent: D256133 (1980-07-01), LaCelle
Playthings, Feb. 1977, p. 109, Sesame Street Electronic Blackboard.

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