Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6671638 | Oscillation measuring method and frequency measuring apparatus | Hitoshi Kitazumi, Tetsuro Maruyama, Junji Watanabe, Yoshimitsu Nishimura, Hiroshi Kodera | 2003-12-30 |
| 4206967 | Optical fiber | Seiichi Onoda, Shojiro Kawakami, Shigeo Nishida, Toshiki Tanaka, Tsuneo Suganuma | 1980-06-10 |
| 4185890 | Optical transmission line | Seiichi Onoda, Toshiki Tanaka, Tsuneo Suganuma, Koji Ishida | 1980-01-29 |
| 4184744 | Optical fiber | Seiichi Onoda, Toshiki Tanaka | 1980-01-22 |