Issued Patents All Time
Showing 1–25 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6084997 | Coupled waveguide structure | Shinsuke Tanaka, Masayoshi Horita, Yuichi Matsushima | 2000-07-04 |
| 5952683 | Functional semiconductor element with avalanche multiplication | Haruhisa Sakata, Yuichi Matsushima | 1999-09-14 |
| 5663572 | Optical functional semiconductor element | Haruhisa Sakata, Yuichi Matsushima | 1997-09-02 |
| 5315422 | Optical Mach-Zehnder type logic element which performs an XOR operation | Yasuyuki Nagao, Yuichi Matsushima, Kazuo Sakai | 1994-05-24 |
| 5208822 | Semiconductor element having opposite signs of .alpha. parameter | Hermann A. Haus | 1993-05-04 |
| 5187717 | Tunable semiconductor laser | Masayoshi Horita, Yuichi Matsushima | 1993-02-16 |
| 5122844 | Quantum well structure and semiconductor device using the same | Shigeyuki Akiba, Masashi Usami, Yuichi Matsushima, Kazuo Sakai | 1992-06-16 |
| 5019519 | Method for the manufacture of optical semiconductor device | Hideaki Tanaka, Shigeyuki Akiba, Masatoshi Suzuki | 1991-05-28 |
| 4946243 | Optical modulation element | Masatoshi Suzuki, Shigeyuki Akiba, Hideaki Tanaka | 1990-08-07 |
| 4923265 | Light triggering switch | Masanobu Fujioka | 1990-05-08 |
| 4918496 | Infrared emitting device with dislocation free layer | Yuichi Matsushima, Kazuo Sakai, Shigeyuki Akiba | 1990-04-17 |
| 4913506 | Optical modulation device | Masatoshi Suzuki, Shigeyuki Akiba, Hideaki Tanaka | 1990-04-03 |
| 4897845 | Semiconductor optical amplifying element | Yuichi Matsushima, Kazuo Sakai, Shigeyuki Akiba | 1990-01-30 |
| 4894818 | Optical packet switching system using multi-stage combination of light triggering switches | Masanobu Fujioka | 1990-01-16 |
| 4874216 | Variable-waveguide optical branching filter | Kazuo Sakai, Yuichi Matsushima, Shigeyuki Akiba | 1989-10-17 |
| 4852108 | Wavelength tunable semiconductor laser with narrow band-pass active filter region | Kazuo Sakai, Yuichi Matsushima | 1989-07-25 |
| 4829535 | Variable wavelength semiconductor laser | — | 1989-05-09 |
| 4826291 | Method for manufacturing diffraction grating | Shigeyuki Akiba, Yuichi Matsushima | 1989-05-02 |
| 4815090 | Distributed feedback semiconductor laser with monitor | Masashi Usami, Shigeyuki Akiba, Yuichi Matsushima | 1989-03-21 |
| 4805975 | Optical waveguide switch | Kazuo Sakai, Yuichi Matsushima | 1989-02-21 |
| 4795225 | Semiconductor optical switch | Kazuo Sakai, Yuichi Matsushima | 1989-01-03 |
| 4773075 | Light emitting device | Shigeyuki Akiba, Yukio Noda, Masatoshi Suzuki | 1988-09-20 |
| 4743087 | Optical external modulation semiconductor element | Shigeyuki Akiba, Yukitoshi Kushiro, Yukio Noda | 1988-05-10 |
| 4731641 | Avalanche photo diode with quantum well layer | Yuichi Matsushima, Kazuo Sakai, Yukitoshi Kushiro, Shigeyuki Akiba, Yukio Noda | 1988-03-15 |
| 4720835 | Integrated semiconductor light emitting element with oscillation wavelength and phase modulated light output | Shigeyuki Akiba, Yukio Noda, Yukitoshi Kushiro | 1988-01-19 |