Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6589906 | Methods for producing oxides or composites thereof | Koji Sato | 2003-07-08 |
| 6355308 | Methods for producing oxides or composites thereof | Koji Sato | 2002-03-12 |
| 5125944 | Process for producing buried wave guide device | Yoshiyuki Asahara, Hiroyuki Sakai, Yoshitaka Yoneda | 1992-06-30 |
| 5078772 | Process for producing buried waveguide device | Yoshiyuki Asahara, Hiroyuki Sakai, Yoshitaka Yoneda | 1992-01-07 |
| 4851024 | Process for producing optical glass | Hiroyuki Sakai, Yoshitaka Yoneda, Yoshiyuki Asahara | 1989-07-25 |
| 4640699 | Process for producing glass product having gradient of refractive index | Seiichi Shingaki, Hiroyuki Sakai, Yoshiyuki Asahara | 1987-02-03 |
| 4563205 | Process for the production of slab-shaped lens having gradient of refractive index in thickness direction only | Yoshiyuki Asahara, Hiroshi Sakai, Seiichi Shingaki | 1986-01-07 |
| 4525189 | Process for producing glass product having gradient of refractive index | Seiichi Shingaki, Hiroyuki Sakai, Yoshiyuki Asahara | 1985-06-25 |