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

Lun Kai Cheng

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Device for measuring an optical path length difference

Optics: measuring and testing – By light interference – Using fiber or waveguide interferometer
Reexamination Certificate

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Device for measuring an optical path length difference

Optics: measuring and testing – By light interference – Using fiber or waveguide interferometer
Reexamination Certificate

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Hydrophone with compensation for statical pressure and method fo

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

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Measuring wavelength change

Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Reexamination Certificate

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Method for correcting disturbances in a level sensor light path

Optics: measuring and testing – Angle measuring or angular axial alignment – Photodetection of inclination from level or vertical
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1221843

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