Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871230 | Single mode phosphate laser glass fiber | Toshiharu Yamashita, Sho Amano, Hidemi Tajima, Isao Masuda | 1989-10-03 |
| 4820662 | Silicophosphate laser glass | Michimasa Matsukawa, Chiemi Hata | 1989-04-11 |
| 4816049 | Process of surface treating laser glass | Chiemi Hata, Kouichi Hara | 1989-03-28 |
| 4806138 | Method for melting fluorophosphate glass | Kiyotaka Miura, Toshiharu Yamashita | 1989-02-21 |