Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859223 | Method of manufacturing polarization-maintaining optical fibers | Hiroshi Kajioka, Koudo Yamada, Tatsuo Teraoka | 1989-08-22 |
| 4818047 | Polarized wave preserving fiber | Hiroshi Kajioka, Tatsuya Kumagai, Toshihide Tokunaga, Kohdo Yamada | 1989-04-04 |