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World Intellectual Property Organization (WIPO).

G02B 1/10 Optical coatings produced by application to, or surface treatment of, optical elements
G02B 1/11 Anti-reflection coatings
G02B 1/12 by surface treatment, e.g. by irradiation
G02B 5/20 optical FILTER(S).

Free patents on line free acces to US patents.

United States Patent and Trademark Office (USPTO)


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Last modified: 09/12/11