Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6301412 | Apparatus and method for making multi-branching optical coupler | Masaaki Shirota, Seiki Ejima, Jun Abe, Sayuri Maeda, Kazuo Koya | 2001-10-09 |
| 5440420 | Optical amplifier | Kazuo Koya | 1995-08-08 |
| 5420950 | Wide wavelength range-optical fiber coupler and method for the preparation thereof | Kazuo Koya | 1995-05-30 |
| 5404415 | Optical fiber coupler and method for preparing same | Kazuo Koya | 1995-04-04 |
| 5329602 | Optical fiber coupler | Kazuo Koya | 1994-07-12 |
| 5295219 | Supporting member for optical fiber coupler | Kazuo Koya, Yukio Fujimaki | 1994-03-15 |