Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine
Patent
1995-02-01
1996-05-28
Word, A. Hugo
Office supplies; artists and teachers materials
Teaching material
Sensory feedback, e.g., audio-visual teaching machine
D14100
Patent
active
D03702359
REFERENCES:
patent: D280530 (1985-09-01), Sugiyama
patent: D329062 (1992-09-01), Chin
patent: 3958344 (1976-05-01), Lesiak
patent: 4997374 (1991-03-01), Simone
Burgess Pamela
Leapfrog RBT
Word A. Hugo
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