4. Aeronautics and astronautics
  5. Aircraft, heavier-than-air
  6. Helicopter or auto-rotating wing sustained, i.e., gyroplanes

William Welsh

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active

Active system and method for vibration and noise reduction

Aeronautics and astronautics – Aircraft – heavier-than-air – Helicopter or auto-rotating wing sustained – i.e. – gyroplanes
Reexamination Certificate

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Night sight and method of making the same

Firearms – Implements – Sight devices
Reexamination Certificate

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Night sight for use with a telescopic sight

Firearms – Implements – Sight devices
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2641671

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