4. Buoys, rafts, and aquatic devices
  5. Swimming aid to increase stroke efficiency
  6. Foot attached

Alan Perry

Inventor

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Expandable swim flipper

Buoys – rafts – and aquatic devices – Swimming aid to increase stroke efficiency – Foot attached
Patent

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Housing for a mail handling machine

Machines not elsewhere specified – Miscellaneous
Patent

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Selective collating and inserting apparatus

Image analysis – Histogram processing – For setting a threshold
Patent

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Staged expandable swim fin

Buoys – rafts – and aquatic devices – Swimming aid to increase stroke efficiency – Foot attached
Reexamination Certificate

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Profile ID: LFUS-PAI-P-901522

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