Issued Patents All Time
Showing 51–75 of 82 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874216 | Variable-waveguide optical branching filter | Katsuyuki Utaka, Kazuo Sakai, Yuichi Matsushima | 1989-10-17 |
| 4837526 | Semiconductor external optical modulator | Masatoshi Suzuki, Yukio Noda, Yukitoshi Kushiro | 1989-06-06 |
| 4826291 | Method for manufacturing diffraction grating | Katsuyuki Utaka, Yuichi Matsushima | 1989-05-02 |
| 4820655 | Method for manufacturing semiconductor optical integrated device with optical waveguide regions | Yukio Noda, Masatoshi Suzuki, Yukitoshi Kushiro | 1989-04-11 |
| 4815090 | Distributed feedback semiconductor laser with monitor | Masashi Usami, Katsuyuki Utaka, Yuichi Matsushima | 1989-03-21 |
| 4811352 | Semiconductor integrated light emitting device | Masatoshi Suzuki, Hideaki Tanaka, Yukitoshi Kushiro | 1989-03-07 |
| 4811353 | Semiconductor optical modulator | Yukio Noda, Masatoshi Suzuki, Yukitoshi Kushiro | 1989-03-07 |
| 4796274 | Semiconductor device with distributed bragg reflector | Masashi Usami, Yukio Noda, Masatoshi Suzuki | 1989-01-03 |
| 4788690 | Distributed feedback semiconductor laser with monitor | Masashi Usami | 1988-11-29 |
| 4773075 | Light emitting device | Katsuyuki Utaka, Yukio Noda, Masatoshi Suzuki | 1988-09-20 |
| 4761383 | Method of manufacturing avalanche photo diode | Yuichi Matsushima, Kazuo Sakai | 1988-08-02 |
| 4743087 | Optical external modulation semiconductor element | Katsuyuki Utaka, Yukitoshi Kushiro, Yukio Noda | 1988-05-10 |
| 4731641 | Avalanche photo diode with quantum well layer | Yuichi Matsushima, Kazuo Sakai, Yukitoshi Kushiro, Yukio Noda, Katsuyuki Utaka | 1988-03-15 |
| 4720835 | Integrated semiconductor light emitting element with oscillation wavelength and phase modulated light output | Katsuyuki Utaka, Yukio Noda, Yukitoshi Kushiro | 1988-01-19 |
| 4701930 | Distributed feedback semiconductor laser | Katsuyuki Utaka, Kazuo Sakai, Yuichi Matsushima | 1987-10-20 |
| 4682196 | Multi-layered semi-conductor photodetector | Kazuo Sakai, Yuichi Matsushima, Katsuyuki Utaka | 1987-07-21 |
| 4665527 | Distributed feedback semiconductor laser | Katsuyuki Utaka, Kazuo Sakai, Yuichi Matsushima | 1987-05-12 |
| 4660934 | Method for manufacturing diffraction grating | Katsuyuki Utaka, Kazuo Sakai, Yuichi Matsushima | 1987-04-28 |
| 4653059 | Distributed feedback semiconductor laser | Katsuyuki Utaka, Kazuo Sakai, Yuichi Matsushima | 1987-03-24 |
| 4653058 | Distributed feedback semiconductor laser with monitor | Katsuyuki Utaka, Kazuo Sakai, Yuichi Matsushima | 1987-03-24 |
| 4648096 | Distributed feedback semiconductor laser | Katsuyuki Utaka, Kazuo Sakai, Yuichi Matsushima | 1987-03-03 |
| 4633474 | Distributed feedback semiconductor laser | Katsuyuki Utaka, Kazuo Sakai, Yuichi Matsushima | 1986-12-30 |
| 4589117 | Butt-jointed built-in semiconductor laser | Katsuyuki Utaka, Kazuo Sakai, Yuichi Matsushima | 1986-05-13 |
| 4573158 | Distributed feedback semiconductor laser | Katsuyuki Utaka, Kazuo Sakai | 1986-02-25 |
| 4573161 | Semiconductor laser | Kazuo Sakai, Yuichi Matsushima, Katsuyuki Utaka | 1986-02-25 |