Devotional and learning device

Details Devotional and learning device Devotional and learning device

1998-12-14

1999-09-28

Holtje, Martie K.

Office supplies; artists and teachers materials

Teaching material

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

D19 59, D99 25, D11122, 1907

Patent

active

D04145143

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patent: D388826 (1998-01-01), Jones-Fenleigh et al.
patent: D408383 (1999-04-01), Carter et al.
patent: 2310738 (1943-02-01), Johnston
patent: 4493652 (1985-01-01), Mike
patent: 5505622 (1996-04-01), Bosmani
patent: 5785528 (1998-07-01), Jones-Fenleigh et al.

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