Synchronous learning device

Details Synchronous learning device Synchronous learning device

2000-12-05

2002-02-19

Aronovich, Adir (Department: 2912)

Office supplies; artists and teachers materials

Teaching material

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

CD14S346000

Design Patent

active

D0453793

CLAIM:
The ornamental design for a synchronous learning device, as shown and described.

REFERENCES:
patent: D222542 (1971-11-01), Matsumoto
patent: 4740913 (1988-04-01), Washizuka et al.
patent: D317626 (1991-06-01), Muller
patent: D375515 (1996-11-01), Takeda et al.
patent: 5827071 (1998-10-01), Sorensen et al.
patent: D433017 (2000-10-01), Martinez

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