Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7468338 | Optical glass, press-molding preform and optical part | Kazutaka Hayashi, Yasuhiro Fujiwara | 2008-12-23 |
| 7140205 | Method of manufacturing glass optical elements | Yasuhiro Fujiwara, Hiroyuki Sakai, Shinichiro Hirota | 2006-11-28 |
| 6844279 | Optical glass, press-molding preform and optical part | Kazutaka Hayashi, Yasuhiro Fujiwara | 2005-01-18 |