Preprogrammed toy sound generator

Details Preprogrammed toy sound generator Preprogrammed toy sound generator

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

D02710307

REFERENCES:
patent: D234466 (1975-03-01), Kitai
patent: D240832 (1976-08-01), Beitler et al.
patent: D247002 (1978-01-01), Katoh
patent: D258654 (1981-03-01), Levy
patent: 3739069 (1973-06-01), Sandmeier

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