Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine
Patent
1994-06-23
1995-06-27
Gandy, James M.
Office supplies; artists and teachers materials
Teaching material
Sensory feedback, e.g., audio-visual teaching machine
Patent
active
D03597601
REFERENCES:
patent: D247363 (1978-02-01), Hughes
patent: 3974593 (1976-08-01), Walker
Burgess Pamela
Gandy James M.
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