4. Measuring and testing
  5. Vibration
  6. By mechanical waves

Ward L. Johnson

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Acoustic resonator for measuring force

Measuring and testing – Vibration – By mechanical waves
Patent

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Electromagnetic acoustic transducer and methods of determining p

Measuring and testing – Vibration – By mechanical waves
Patent

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Electromagnetic acoustic transducer and methods of determining p

Measuring and testing – Vibration – By mechanical waves
Patent

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Electromagnetic acoustic transducer and methods of...

Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate

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