Electronic learning apparatus

Details Electronic learning apparatus Electronic learning apparatus

1998-10-02

2000-04-18

Nunn, Freda

Office supplies; artists and teachers materials

Teaching material

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

D14106, D19 59, 1907

Patent

active

D04230515

REFERENCES:
patent: D310071 (1990-08-01), Kit
patent: D356781 (1995-03-01), Poon
patent: D358171 (1995-05-01), Cheng
patent: D380231 (1997-06-01), Chow
patent: D384043 (1997-09-01), Tamaki
patent: D385276 (1997-10-01), Griggs
patent: 4604064 (1986-08-01), Boehm et al.

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