Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine
Patent
1995-01-10
1997-07-29
Lucas, Susan J.
Office supplies; artists and teachers materials
Teaching material
Sensory feedback, e.g., audio-visual teaching machine
D21 13, D14100, 1907
Patent
active
D03816850
REFERENCES:
patent: D320624 (1991-10-01), Taylor
patent: D345382 (1994-03-01), Valdes
patent: D347246 (1994-05-01), Wen
patent: D363511 (1995-10-01), Hui
patent: 4997374 (1991-03-01), Simone
Burgess Pamela
Lucas Susan J.
Vtech Industries, L.L.C.
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