Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8820122 | Titania-doped quartz glass and making method | Shigeru Maida, Hisatoshi Otsuka, Naoki Yanagisawa | 2014-09-02 |
| 8596095 | Manufacture of synthetic quartz glass ingot and synthetic quartz glass member | Hisatoshi Otsuka, Kazuo Shirota | 2013-12-03 |
| 7954340 | Synthetic quartz glass substrate for excimer lasers and making method | Hisatoshi Otsuka, Kazuo Shirota | 2011-06-07 |
| 7827824 | Synthetic quartz glass substrate for excimer lasers and making method | Hisatoshi Otsuka, Kazuo Shirota | 2010-11-09 |