4. Communications, electrical: acoustic wave systems and devices
  5. Signal transducers
  6. Underwater type

Donald A. Frederick

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Acoustic sensing system for downhole seismic applications...

Communications – electrical: acoustic wave systems and devices – Seismic prospecting
Reexamination Certificate

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Acoustic sensing system for downhole seismic applications...

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Reexamination Certificate

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Acoustic sensing system for downhole seismic applications...

Optical waveguides – Optical waveguide sensor – Including physical deformation or movement of waveguide
Reexamination Certificate

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Apparatus and method for detecting rotation rate, Faraday bias a

Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
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Architecture for large optical fiber array using standard...

Optical waveguides – With optical coupler – Plural
Reexamination Certificate

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Profile ID: LFUS-PAI-P-52026

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