4. Radiant energy
  5. Photocells; circuits and apparatus
  6. Optical or pre-photocell system

Pierre Senecal

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Gravity orientation device having an encoder and a rotatable sha

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent

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System for monitoring the walls of a borehole using a video came

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
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Profile ID: LFUS-PAI-P-751694

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