4. Land vehicles
  5. Skates
  6. Wheeled skate

Robert T. Sefton

Inventor

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In-line roller skate braking mechanism

Land vehicles – Skates – Wheeled skate
Patent

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Virtual reality system

Computer graphics processing and selective visual display system – Image superposition by optical means – Operator body-mounted heads-up display
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1496436

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