4. Optics: measuring and testing
  5. Document pattern analysis or verification

Seiya Shibuya

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Medium for identifying matter to be identified and method...

Stock material or miscellaneous articles – Fraud or tamper detecting
Reexamination Certificate

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Optical identification system using cholesteric liquid crystals

Optics: measuring and testing – Document pattern analysis or verification
Patent

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System for optically identifying an object

Optical: systems and elements – Diffraction – From grating
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1214060

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