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

John F. Small

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Ceiling texture scraping tool with vacuum system and method...

Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Reexamination Certificate

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System for assuring hot face identification of refractory kiln l

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

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Profile ID: LFUS-PAI-P-780361

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