4. Education and demonstration
  5. Communication aids for the handicapped
  6. Tactile reading aid
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Device for displaying graphic information

Education and demonstration – Communication aids for the handicapped – Tactile reading aid
Patent

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Device for forming Braille tactile display

Education and demonstration – Communication aids for the handicapped – Tactile reading aid
Patent

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Device for forming tactile display

Education and demonstration – Communication aids for the handicapped – Tactile reading aid
Patent

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Device for representing braille on information signal recording

Education and demonstration – Communication aids for the handicapped – Tactile reading aid
Patent

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Device for representing relief items

Education and demonstration – Communication aids for the handicapped – Tactile reading aid
Patent

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Display device suited for a blind person

Education and demonstration – Communication aids for the handicapped – Tactile reading aid
Reexamination Certificate

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