Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820662 | Silicophosphate laser glass | Tetsuro Izumitani, Michimasa Matsukawa | 1989-04-11 |
| 4816049 | Process of surface treating laser glass | Kouichi Hara, Tetsuro Izumitani | 1989-03-28 |