4. Optics: measuring and testing
  5. For light transmission or absorption

William M. Christensen

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Optical product detection sensor

Optics: measuring and testing – For light transmission or absorption
Reexamination Certificate

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Portable multi-channel device for optically testing a liquid...

Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Reexamination Certificate

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