4. Coating processes
  5. Measuring, testing, or indicating
  6. Thickness or uniformity of thickness determined

Howard T. Betz

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Registration mark detector

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

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Rugate optical filter systems

Coating processes – Measuring – testing – or indicating – Thickness or uniformity of thickness determined
Patent

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Rugate optical filter systems

Optics: measuring and testing – By particle light scattering – With photocell detection
Patent

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Profile ID: LFUS-PAI-P-96085

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