4. Measuring and testing
  5. Inspecting

William W. Curtis, Jr.

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Method and apparatus for high speed measurement of oilfield tubu

Optics: measuring and testing – By configuration comparison – With photosensitive film or plate
Patent

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Method and apparatus for noncontact magnetic particle stray magn

Electricity: measuring and testing – Magnetic – By paramagnetic particles
Patent

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Oilfield tubular inspection method and apparatus

Measuring and testing – Inspecting
Patent

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Rotating electromagnetic field defect detection system for...

Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Reexamination Certificate

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Profile ID: LFUS-PAI-P-310904

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