Electronic educational toy

Details Electronic educational toy Electronic educational toy

1994-06-14

1996-04-16

Word, A. Hugo

Office supplies; artists and teachers materials

Teaching material

Sensory feedback, e.g., audio-visual teaching machine

Patent

active

D03689310

REFERENCES:
patent: D238423 (1976-01-01), Robinson
patent: D253709 (1979-12-01), Shiraishi
patent: D260660 (1981-08-01), Mayer
patent: D280217 (1985-08-01), Tomozawa et al.
patent: D318069 (1991-07-01), Cheung et al.
patent: D318306 (1991-07-01), Cheung
patent: D324075 (1992-02-01), Leung
patent: D345377 (1994-03-01), Poon
patent: D345965 (1994-04-01), Hankes
patent: 3853321 (1974-12-01), Claffie
patent: 4968255 (1990-11-01), Lee et al.
patent: 4988321 (1991-01-01), Goldfarb
patent: 5188533 (1993-02-01), Wood

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