Issued Patents 1997
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5702784 | Polypropylene heat shrinkable film | Kiyoshi Sogabe, Hiroyuki Tanaka, Shinji Arai | 1997-12-30 |
| 5694239 | Optical phase conjugator, optical transmission system using the same, and optical phase conjugation method | Masayuki Shigematsu | 1997-12-02 |
| 5680491 | Optical fiber dispersion compensation device for optical communication system | Masayuki Shigematsu, Tomonori Kashiwada | 1997-10-21 |
| 5661826 | Transmission line switching apparatus | Kazuhito Saito, Tohru Yamanishi, Hideo Kobayashi, Toshiaki Katagiri, Masao Tachikura | 1997-08-26 |
| 5640269 | Optical fiber amplifier and optical amplifier repeater | Masayuki Shigematsu, Koji Nakazato, Tomonori Kashiwada | 1997-06-17 |
| 5613021 | Optical fiber switching device having one of a robot mechanism and an optical fiber length adjustment unit | Kazuhito Saito, Tohru Yamanishi, Hideo Kobayashi, Toshiaki Katagiri, Masao Tachikura | 1997-03-18 |