Electronic book with display screen and speaker

Details Electronic book with display screen and speaker Electronic book with display screen and speaker

1994-09-01

1995-09-19

Word, A. Hugo

Office supplies; artists and teachers materials

Teaching material

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

D14106, D21 13, D18 7

Patent

active

D03624617

REFERENCES:
patent: D222301 (1971-10-01), Yamamoto
patent: D223301 (1972-04-01), Link
patent: D227114 (1973-06-01), Inatomi
patent: D249388 (1978-09-01), Sulek et al.
patent: D290373 (1987-06-01), Yubisui et al.
patent: D294151 (1988-02-01), Kno
patent: D300534 (1989-04-01), Luong
patent: D309748 (1990-08-01), Kobayashi
patent: D316557 (1991-04-01), Ido
patent: D348439 (1994-07-01), Luong

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