Erhard Effer

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Anti-reflection film for an optical element consisting of an org

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Optically transparent photochromic plastic material

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
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Process for the production of a photochromic object

Compositions – Light transmission modifying compositions – Displaying color change
Reexamination Certificate

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Profile ID: LFUS-PAI-P-258631

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