4. Optics: measuring and testing
  5. Refraction testing
  6. Prism engaging specimen

Lois J. Thomson

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Automatic calibration control for color grading apparatus

Optics: measuring and testing – By shade or color
Patent

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Color grading apparatus utilizing infrared light source

Optics: measuring and testing – Refraction testing – Prism engaging specimen
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Parts assembler for ballpoint pens

Metal working – Means to assemble or disassemble – Means to insert or extract pen point
Patent

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Profile ID: LFUS-PAI-P-407981

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