Electronic teaching keyboard housing

Details Electronic teaching keyboard housing Electronic teaching keyboard housing

1995-01-17

1997-12-02

Lucas, Susan J.

Office supplies; artists and teachers materials

Teaching material

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

D21 13, D14100, 1907

Patent

active

D03870901

REFERENCES:
patent: D338045 (1993-08-01), Rosen
patent: D345377 (1994-03-01), Poon
patent: D350373 (1994-09-01), Chou et al.
patent: D363085 (1995-10-01), Cameron
patent: D363511 (1995-10-01), Hui
ABC School Supplies, 1994. p.320. Element 359-17341.

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