Issued Patents 1989
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873115 | Method of sythesizing carbon film and carbon particles in a vapor phase | Mitsuo Matsumura | 1989-10-10 |
| 4862472 | Semiconductor laser device | Haruhisa Takiguchi, Shinji Kaneiwa, Hiroaki Kudo, Chitose Sakane | 1989-08-29 |
| 4852961 | Nonlinear optical waveguide device including grating for changing of the wavelength of light | Osamu Yamamoto | 1989-08-01 |
| 4852116 | Semiconductor laser device | Haruhisa Takiguchi, Shinji Kaneiwa, Hiroaki Kudo | 1989-07-25 |
| 4849985 | Distributed feedback semiconductor laser device | Haruhisa Takiguchi, Shinji Kaneiwa, Hiroaki Kudo | 1989-07-18 |
| 4841534 | Buried type semiconductor laser device | Haruhisa Takiguchi, Shinji Kaneiwa, Hiroaki Kudo, Sadayoshi Matsui | 1989-06-20 |
| 4839900 | Buried type semiconductor laser device | Haruhisa Takiguchi, Shinji Kaneiwa, Hiroaki Kudo, Sadayoshi Matsui | 1989-06-13 |
| 4820019 | Optical device | Haruhisa Takiguchi, Shinji Kaneiwa | 1989-04-11 |
| 4819240 | Light modulator | Haruhisa Takiguchi, Shinji Kaneiwa, Sadayoshi Matsui | 1989-04-04 |
| 4813069 | Computer system having automatic answering telephone function | Nobuo Tanaka, Satoshi Tominaga, Hisao Okada | 1989-03-14 |
| 4806454 | Method for the formation of a diffraction grating | Haruhisa Takiguchi, Shinji Kaneiwa, Sadayoshi Matsui | 1989-02-21 |
| 4805183 | Distributed feedback semiconductor laser device | Hiroaki Kudo, Haruhisa Takiguchi, Shinji Kaneiwa | 1989-02-14 |
| 4803690 | Semiconductor laser | Haruhisa Takiguchi, Shinji Kaneiwa, Sadayoshi Matsui | 1989-02-07 |
| 4799227 | Semiconductor laser device having a buried heterostructure | Shinji Kaneiwa, Haruhisa Takiguchi, Sadayoshi Matsui | 1989-01-17 |