Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine
Patent
1995-12-01
1997-04-01
Lucas, Susan J.
Office supplies; artists and teachers materials
Teaching material
Sensory feedback, e.g., audio-visual teaching machine
D21 13, D14100
Patent
active
D03786862
REFERENCES:
patent: D321174 (1991-10-01), Tsuchiya
patent: D321175 (1991-10-01), Tsuchiya
patent: D362270 (1995-09-01), Allen
patent: 4855725 (1989-08-01), Fernandez
Proctor Roger P.
Rankin Robert R.
Burgess Pamela
Dutton, Jr. Harold H.
Jamison W. Charles L.
Liebman Diane F.
Lucas Susan J.
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