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

William J. Hopper

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Aquadynamic swim apparatus

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

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Hydrodynamic foil angle of incidence control system

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

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Non-invasive sinus pain relieving assembly

Surgery – Respiratory method or device – Face mask covering a breathing passage
Reexamination Certificate

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Non-invasive sinus pain relieving assembly and method

Surgery – Respiratory method or device
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1142361

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