4. Radiant energy
  5. Photocells; circuits and apparatus
  6. Photocell controls its own optical systems

Thomas Joe Hamilton

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Low power phototransistor-based welding helmet providing...

Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Reexamination Certificate

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Low power phototransistor-based welding helmet providing...

Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Low power phototransistor-based welding providing reduced...

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

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Profile ID: LFUS-PAI-P-2790146

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