Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine
Patent
1995-01-10
1997-06-24
Vinson, Brian N.
Office supplies; artists and teachers materials
Teaching material
Sensory feedback, e.g., audio-visual teaching machine
D14100, D21 13, 1907
Patent
active
D03802310
REFERENCES:
patent: D321176 (1991-10-01), Ma
patent: D342501 (1993-12-01), Saeki et al.
patent: D343831 (1994-02-01), Spoeth
patent: 4731027 (1988-03-01), Phinny
Burgess Pamela
Vinson Brian N.
VTECH Industries, Inc.
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