Electronic educational game for introducing children to basic ma

Details Electronic educational game for introducing children to basic ma Electronic educational game for introducing children to basic ma

1989-05-03

1991-07-09

Burke, Wallace R.

Office supplies; artists and teachers materials

Teaching material

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

D21 13, D18 7

Patent

active

D03180697

REFERENCES:
patent: D276733 (1984-12-01), Nagel et al.
patent: D280217 (1985-08-01), Tomozawa et al.
patent: D299473 (1989-01-01), Murphy
patent: 4189779 (1980-02-01), Brautingham

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