| http://www.w3.org/ns/prov#value | - The present invention is an optical fiber whose base material is silica glass and that has a two layer structure...http://www.google.com/patents/US6928211?utm_source=gb-gplus-sharePatent US6928211 - Optical fiber and optical transmission path that uses the optical fiberAdvanced Patent SearchPublication numberUS6928211 B2Publication typeGrantApplication numberUS 10/636,552Publication dateAug 9, 200
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