4. Education and demonstration
  5. Communication aids for the handicapped
  6. Tactile reading aid

Chozo Okada

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Braille print board

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

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Braille printing plate

Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
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Profile ID: LFUS-PAI-P-1560633

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