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

McDonnell Douglas Helicopter Co.

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Blade vortex interaction noise reduction techniques for a rotorc

Fluid reaction surfaces (i.e. – impellers) – With means moving working fluid deflecting working member... – Cyclic movement of member or part
Patent

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Bonded composite structure and its fabrication

Stock material or miscellaneous articles – Composite – Of epoxy ether
Reexamination Certificate

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Bonded composite structure and its fabrication

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent

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Bulk absorber and process for manufacturing same

Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Reexamination Certificate

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Concentric face gear transmission assembly

Machine element or mechanism – Gearing – Directly cooperating gears
Patent

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Profile ID: LFUS-PAI-P-286651

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