4. Office supplies; artists and teachers materials
  5. Teaching material
  6. Sensory feedback, e.g., audio-visual teaching machine

Gordon L. Haas

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Devotional and learning device

Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine
Patent

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Devotional and learning device

Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Devotional and learning device

Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Devotional and learning devices

Education and demonstration – Religion
Patent

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