4. Acoustics
  5. Sound-modifying means
  6. Muffler, fluid conducting type

Reinhard Pongratz

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Acoustic absorber and sound-absorption method

Acoustics – Sound-modifying means – Muffler – fluid conducting type
Reexamination Certificate

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Method and device for avoiding a collision of a rotating...

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-2619126

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