4. Optical: systems and elements
  5. Optical aperture or tube, or transparent closure

Paul J. O'Brien

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Fluid flow cell

Optics: measuring and testing – Sample – specimen – or standard holder or support – Fluid containers
Reexamination Certificate

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Weldable sightglass assembly

Optical: systems and elements – Optical aperture or tube – or transparent closure
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2435841

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