4. Electrical audio signal processing systems and devices
  5. Acoustical noise or sound cancellation
  6. Within cabin or compartment of vehicle

Guy D. Billoud

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Active noise control system for closed spaces such as...

Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Within cabin or compartment of vehicle
Reexamination Certificate

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Active vibration control system for helicopter with improved...

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

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Profile ID: LFUS-PAI-P-2445502

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