4. Education and demonstration
  5. Communication aids for the handicapped

Ruth B. Leff

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Cabinet for instructional electronic communication

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

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Communication aid

Communications: electrical – Systems – Call station
Patent

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Communication aid

Education and demonstration – Communication aids for the handicapped
Patent

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Communication aid

Printed matter – Calendar
Patent

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Communication aid using multiple membrane switches

Education and demonstration – Question or problem eliciting response
Patent

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Profile ID: LFUS-PAI-P-666108

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