4. Optics: measuring and testing
  5. Range or remote distance finding
  6. With photodetection

Luke D Ratcliffe

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Acoustic ranging

Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With time interval measuring means
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Aiming telescope having a range finder

Optics: measuring and testing – Range or remote distance finding – With photodetection
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Apparatus and method for calibrating an acoustic detection...

Communications – electrical: acoustic wave systems and devices – Distance or direction finding – With electromagnetic wave
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Apparatus and method for detecting optical systems in a terrain

Optics: measuring and testing – Angle measuring or angular axial alignment – Automatic following or aligning while indicating measurement
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Apparatus and method for detection of optical systems in a...

Optics: measuring and testing – Angle measuring or angular axial alignment – With photodetection remote from measured angle
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Profile ID: LFUS-PAI-P-2171981

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