4. Land vehicles
  5. Skates
  6. Wheeled skate

Robert S. Prus

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Engine noise simulating novelty device

Electrical audio signal processing systems and devices – Sound effects
Reexamination Certificate

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In-line skate suspension system

Land vehicles – Skates – Wheeled skate
Patent

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Sleeping driver detector and alarm system

Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate

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Profile ID: LFUS-PAI-P-763959

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