| http://www.w3.org/ns/prov#value | - 7Jun 18, 2009Feb 7, 2012Essilor International (Compagnie Generale D'optique)Photochromic coating exhibiting improved performanceUS8147725Sep 1, 2010Apr 3, 2012Transitions Optical, IncPhotochromic materials having extended pi-conjugated systems and compositions and articles including the sameUS8153344Jul 16, 2004Apr 10, 2012Ppg Industries Ohio, Inc.Methods for producing photosensitive microparticle
|