4. Measuring and testing
  5. Borehole or drilling
  6. Downhole test

John R. Howatt

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Apparatus for directly measuring machine tool wear

Boots – shoes – and leggings
Patent

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Fault-tolerant clock system

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent

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Inertial borehole survey system

Measuring and testing – Borehole or drilling – Downhole test
Patent

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Inertial borehole survey system

Measuring and testing – Borehole or drilling – Downhole test
Patent

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Optically isolated interface circuits

Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent

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Profile ID: LFUS-PAI-P-634603

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