Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine
Patent
1981-11-13
1984-04-24
Feifer, Melvin B.
Office supplies; artists and teachers materials
Teaching material
Sensory feedback, e.g., audio-visual teaching machine
D14106
Patent
active
D02735946
REFERENCES:
patent: D255795 (1980-07-01), Marshall
patent: D258889 (1981-04-01), Hayashi
patent: 4016411 (1977-04-01), Genin
Playthings, May 1980, p. 62, lower left, "Mac".
Play Meter, Dec. 1980, p. 113, top illustration, game housing.
Ekstrand Roy A.
Feifer Melvin B.
Goldman Ron M.
Mattel Inc.
O'Neill James G.
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