Issued Patents All Time
Showing 26–45 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5809047 | Method for driving a wavelength changeable light source apparatus, such a wavelength changeable light source apparatus and an optical communication system using the same | — | 1998-09-15 |
| 5790581 | Oscillation polarization mode selective semiconductor laser, light transmitter and optical communication system using the laser | — | 1998-08-04 |
| 5659560 | Apparatus and method for driving oscillation polarization selective light source, and optical communication system using the same | Toshihiko Ouchi, Masao Majima, Seiji Mishima, Ouichi Kubota | 1997-08-19 |
| 5608572 | Optical apparatus and a method using the apparatus, which utilizes the occurrence of a change in a both-end voltage of an amplifying region | Kenji Nakamura | 1997-03-04 |
| 5606176 | Strained quantum well structure having variable polarization dependence and optical device including the strained quantum well structure | — | 1997-02-25 |
| 5590145 | Light-emitting apparatus capable of selecting polarization direction, optical communication system, and polarization modulation control method | — | 1996-12-31 |
| 5521754 | Optical apparatus and a method using the apparatus, which utilizes the occurrence of a change in a both-end voltage of an amplifying region | Kenji Nakamura | 1996-05-28 |
| 5471335 | Semiconductor optical amplifier device and a method of using the same | — | 1995-11-28 |
| 5440581 | Semiconductor optical filter and an optical communication system using the same | Takeo Ono | 1995-08-08 |
| 5414549 | Semiconductor optical amplifying apparatus | Michiyo Nishimura, Kenji Nakamura, Masao Majima, Toru Nakata | 1995-05-09 |
| 5309268 | Optical communication system and optical communication method | Kenji Nakamura | 1994-05-03 |
| 5309275 | Semiconductor optical amplifying apparatus | Michiyo Nishimura, Kenji Nakamura, Masao Majima, Toru Nakata | 1994-05-03 |
| 5287521 | Method and apparatus for releasing and obtaining shared and exclusive locks | Shigeru Yoneda, Shoji Yamamoto | 1994-02-15 |
| 5251318 | Multiprocessing system comparing information copied from extended storage before and after processing for serializing access to shared resource | Shigeru Yoneda, Tetsuo Murakawa | 1993-10-05 |
| 5224114 | Semiconductor laser devices with a plurality of light emitting layers having different bands gaps and methods for driving the same | Sotomitsu Ikeda | 1993-06-29 |
| 5223972 | Optical amplifiers, optical communication systems networks using the amplifier and integrated optical nodes including the amplifier | Michiyo Nishimura, Kenji Nakamura, Masao Majima, Tohru Nakata | 1993-06-29 |
| 5212577 | Optical communication equipment and optical communication method | Kenji Nakamura | 1993-05-18 |
| 5202782 | Optical communication method and optical communication system | Kenji Nakamura | 1993-04-13 |
| 5157544 | Waveguide optical element and its driving method | — | 1992-10-20 |
| 5109511 | Shared resource managing method and system | Shoji Yamamoto, Shigeru Yoneda | 1992-04-28 |