Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine
Patent
1996-04-09
1999-04-06
Burgess, Pamela
Office supplies; artists and teachers materials
Teaching material
Sensory feedback, e.g., audio-visual teaching machine
1907
Patent
active
D04077482
REFERENCES:
patent: D309923 (1990-08-01), Cheung
patent: D318306 (1991-07-01), Cheung
patent: D345377 (1994-03-01), Poon
patent: D362870 (1995-10-01), Oikawa
patent: D369831 (1996-05-01), Chow et al.
patent: D370235 (1996-05-01), Wood
patent: D370892 (1996-06-01), Shima et al.
Tsang Frederick L. T.
Yiu Ivy W. M.
Burgess Pamela
VTech Industries, LLC
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