Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6954562 | Matrix switch of optical waveguide type and method for manufacturing the same | Katsuhiko Kurumada, Toshiaki Tamamura, Makoto Sato, Katsunari Okamoto | 2005-10-11 |
| 6885823 | Wavelength multiplexing/demultiplexing unit, wavelength multiplexing/demultiplexing apparatus and wavelength multiplexing/demultiplexing method | Kuniharu Kato, Yasufumi Yamada, Taisuke Oguchi | 2005-04-26 |
| 5062680 | Plate plastics optical waveguide | Saburo Imamura | 1991-11-05 |
| 4425146 | Method of making glass waveguide for optical circuit | Hidefumi Mori, Nobuo Shimizu, Yasuji Murakami | 1984-01-10 |
| 4224046 | Method for manufacturing an optical fiber preform | Toru Kuwabara, Yuichi Masuda, Yuji Kameo | 1980-09-23 |