Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine
Patent
1994-06-02
1996-01-23
Word, A. Hugo
Office supplies; artists and teachers materials
Teaching material
Sensory feedback, e.g., audio-visual teaching machine
D21 13, D14106
Patent
active
D03664996
REFERENCES:
patent: D328474 (1992-08-01), Chen
patent: D338045 (1993-08-01), Rosen
patent: D342289 (1993-12-01), Hara
patent: D347856 (1994-06-01), Marfori et al.
patent: D349730 (1994-08-01), Fung
patent: 4372554 (1983-02-01), Orenstein
VTech Catalog, pp. 30-31, 1992.
Burgess Pamela
VTECH Industries, Inc.
Word A. Hugo
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