4. Data processing: measuring, calibrating, or testing
  5. Measurement system in a specific environment
  6. Earth science

Key Energy Services, Inc.

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Activity data capture system for a well service vehicle

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Reexamination Certificate

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Engine speed limiter for a hoist

Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Reexamination Certificate

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Ergonomics safety warning device and method to prevent...

Interrelated power delivery controls – including engine control – Clutch control – Condition responsive control
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Inventory counter for oil and gas wells

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

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Mechanical multiplier for a strain gage on a derrick

Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Specified load or strain transmission device from specimen...
Reexamination Certificate

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