Electronic instrument for teaching the alphabet

Details Electronic instrument for teaching the alphabet Electronic instrument for teaching the alphabet

1994-07-12

1995-09-12

Word, A. Hugo

Office supplies; artists and teachers materials

Teaching material

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

D14100

Patent

active

D03622703

REFERENCES:
patent: D137905 (1944-05-01), Kardux
patent: D354742 (1995-01-01), Hamilton
patent: 4142236 (1979-02-01), Martz et al.
patent: 4664633 (1987-05-01), Garda
patent: 5027523 (1991-07-01), MacLeod

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