Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine
Patent
1992-12-29
1995-07-11
Burke, Wallace R.
Office supplies; artists and teachers materials
Teaching material
Sensory feedback, e.g., audio-visual teaching machine
Patent
active
D03602249
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patent: D281334 (1985-11-01), Adams
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patent: D318069 (1991-07-01), Cheung et al.
patent: D318306 (1991-07-01), Cheung
patent: D324086 (1992-02-01), Woo
patent: 4968255 (1990-11-01), Lee et al.
patent: 4997374 (1991-03-01), Simone
Playthings May 1980. Touch 'n Hear Musical Bear. p. 75.
1988 Video Technology Industries, Inc. catalog, p. 9.
1990 Video Technology Industries, Inc. catalog, pp. 3,4.
Chow Chi K. W.
Lau Chung P. C.
Tsang Frederick L. T.
Burgess Pamela
Burke Wallace R.
VTECH Industries, Inc.
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