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Method for the holographical security of a document and the manufacture of such a document film for the implementation of said method and document so secure.
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Securement of documents or products by affixing an optically active component for verifying authenticity
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Secure marking label, particularly for motor vehicle
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Method for irreversible transfer of a diffraction network, transfer film and device for implementing the method
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Method for irreversible transfer of a diffraction grating. Transfer film and device for implementing the process.
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Method for marking products or documents, product thus marked and means for implementing the method and a device for verifying such a product or document.
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Method for producing an optically variable image.
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