Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859223 | Method of manufacturing polarization-maintaining optical fibers | Koudo Yamada, Yuuetsu Takuma, Tatsuo Teraoka | 1989-08-22 |
| 4848867 | Rotary joint for polarization plane maintaining optical fibers | Toshio Fukahori, Noribumi Shiina, Hitoshi Morinaga | 1989-07-18 |
| 4818047 | Polarized wave preserving fiber | Yuuetsu Takuma, Tatsuya Kumagai, Toshihide Tokunaga, Kohdo Yamada | 1989-04-04 |