Cabinet for instructional electronic communication

Details Cabinet for instructional electronic communication Cabinet for instructional electronic communication

1993-09-15

1995-10-31

Word, A. Hugo

Office supplies; artists and teachers materials

Teaching material

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

D14160

Patent

active

D03637417

REFERENCES:
patent: D143182 (1945-12-01), Camras
patent: D227109 (1973-06-01), Rosen et al.
patent: D242451 (1976-11-01), Zamora
patent: D282935 (1986-03-01), Shifflett
patent: 3587178 (1971-06-01), Kojima

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