4. Aeronautics and astronautics
  5. Aircraft, heavier-than-air
  6. Airplane sustained

William D. Bertelsen

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Arc wing aircraft

Aeronautics and astronautics – Aircraft – heavier-than-air – Airplane sustained
Patent

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Deflection testing fixture assembly and methods of testing

Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent

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High pressure deflection testing system and methods of...

Measuring and testing – Fluid pressure gauge – Diaphragm
Reexamination Certificate

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Profile ID: LFUS-PAI-P-301677

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