Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5048922 | Optical fiber cable | Yoshinori Namihira, Makoto Nunokawa, Yoshinao Iwamoto, Hitoshi Yamamoto | 1991-09-17 |
| 5042039 | Er-doped optical fiber laser device | Noboru Edagawa, Hiroharu Wakabayashi | 1991-08-20 |
| 4972513 | Multi-point optical amplification repeating system | Noboru Edagawa, Yoshinao Iwamoto | 1990-11-20 |
| 4933990 | Optical privacy communication system in two-way optical transmission system | Hiroharu Wakabayashi, Yoshinao Iwamoto | 1990-06-12 |
| 4923291 | Optical amplification | Noboru Edagawa, Yoshinao Iwamoto | 1990-05-08 |
| 4899043 | Fault monitoring system for optical fiber communication systems | Noboru Edagawa, Yoshinao Iwamoto | 1990-02-06 |
| 4888817 | Polarization diversity light receiving system using baseband combining | Shiro Ryu | 1989-12-19 |
| 4805977 | Optical coupler for optical direct amplifier | Yasuaki Tamura | 1989-02-21 |
| 4790655 | System for measuring laser spectrum | Shu Yamamoto | 1988-12-13 |
| 4720162 | Device for switching from one light source to another | Hiroharu Wakabayashi, Yoshihori Namihira, Hideharu Tokiwa | 1988-01-19 |
| 4595284 | Method and apparatus for measuring distribution of elongation in an optical cable | Koichi Tatekura, Yoshihiro Ejiri | 1986-06-17 |
| 4572608 | Optical de-polarizer | Yoshinori Namihira | 1986-02-25 |
| 4411520 | Light dispersion measuring apparatus | Hiroharu Wakabayashi, Yasuhiko Niiro | 1983-10-25 |
| 4401364 | Optical repeater system for optical communication | — | 1983-08-30 |