Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6961485 | Optical switch | Kei Chiba, Masao Saito | 2005-11-01 |
| 6950596 | Variable optical attenuator | Akira Yahagi, Shigeru Kasai, Tatsumi Ide | 2005-09-27 |
| 5850140 | Electric field sensor having sensor head with unbalanced electric field shield to shield branched optical waveguides against an applied electric field | Yuichi Tokano | 1998-12-15 |
| 5781003 | Electric field sensor | — | 1998-07-14 |
| 5574805 | Electric field sensor | Yoshikazu Toba, Yoshiro Sato, Kazuhisa Hayeiwa, Hisashi Naka, Tadasu Ishikawa | 1996-11-12 |
| 4618210 | Optical switch of switched directional coupler type | — | 1986-10-21 |
| 4608682 | Optical time-division switching system employing optical bistable devices | Kunio Nagashima | 1986-08-26 |
| 4387343 | Electrooptic light modulator including weighted interdigital electrodes | — | 1983-06-07 |
| 4359268 | Light quantity control apparatus | — | 1982-11-16 |
| 4327971 | Electro-optical light modulators, light wavelength multiplex signal transmitting apparatus and light wavelength separating switches utilizing the same | Yoshinori Ohta, Mitsuhito Sakaguchi | 1982-05-04 |