4. Fluid reaction surfaces (i.e., impellers)
  5. Removable auxiliary attachment to work surface

Roger Drobietz

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Assembly for reducing noise in turbofan engines

Acoustics – Sound-modifying means – Sound absorbing panels
Reexamination Certificate

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Noise reducer for rotor blade in wind turbine

Fluid reaction surfaces (i.e. – impellers) – Removable auxiliary attachment to work surface
Reexamination Certificate

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Noise reducing vortex generators on aircraft wing control...

Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Reexamination Certificate

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Process and apparatus for noise reduction in multi-engine...

Aeronautics and astronautics – Miscellaneous
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Profile ID: LFUS-PAI-P-2281480

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