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Process for the improvement of selectivity of spectrometric meas

Optics: measuring and testing – By shade or color – With color transmitting filter
Patent

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Process for visually detecting a color drift in a polychrome rep

Optics: measuring and testing – By shade or color
Patent

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Process photometer

Optics: measuring and testing – By shade or color – With color transmitting filter
Reexamination Certificate

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Process photometer

Optics: measuring and testing – By shade or color – With color transmitting filter
Reexamination Certificate

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Process, apparatus and color measuring strip for evaluating prin

Optics: measuring and testing – By shade or color
Patent

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Produce data collector and produce recognition system

Optics: measuring and testing – By shade or color
Reexamination Certificate

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Product discrimination system

Optics: measuring and testing – By shade or color – With sample responsive to plural colors applied simultaneously
Patent

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Product discrimination system and method therefor

Optics: measuring and testing – By shade or color – With sample responsive to plural colors applied simultaneously
Patent

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Providing optical feedback on light color

Optics: measuring and testing – By shade or color – Tristimulus examination
Reexamination Certificate

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