Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841533 | Semiconductor laser device having a graded index waveguide | Toshiro Hayakawa, Masafumi Kondo, Kohsei Takahashi, Saburo Yamamoto | 1989-06-20 |
| 4835783 | Semiconductor laser | Toshiro Hayakawa, Kohsei Takahashi, Masafumi Kondo, Saburo Yamamoto | 1989-05-30 |
| 4824518 | Method for the production of semiconductor devices | Toshiro Hayakawa, Kohsei Takahashi, Saburo Yamamoto | 1989-04-25 |
| 4807235 | Semiconductor laser device | Kohsei Takahashi, Saburo Yamamoto, Toshiro Hayakawa, Masafumi Kondo | 1989-02-21 |
| 4806994 | Semiconductor device | Toshiro Hayakawa, Kohsei Takahashi, Saburo Yamamoto | 1989-02-21 |
| 4787089 | Quantum well semiconductor laser device | Toshiro Hayakawa, Kohsei Takahashi, Masafumi Kondo, Saburo Yamamoto | 1988-11-22 |
| 4769822 | Semiconductor laser device | Kohsei Takahashi, Saburo Yamamoto, Toshiro Hayakawa, Masafumi Kondo | 1988-09-06 |
| 4761790 | Optical semiconductor device | Toshiro Hayakawa, Kohsei Takahashi, Saburo Yamamoto | 1988-08-02 |
| 4759024 | Semiconductor laser device having an oscillation wavelength in the visible short-wavelength region | Toshiro Hayakawa, Kosei Takahashi, Saburo Yamamoto | 1988-07-19 |
| 4750183 | Semiconductor laser device | Kohsei Takahashi, Toshiro Hayakawa, Masafumi Kondo, Saburo Yamamoto | 1988-06-07 |
| 4746181 | Optical semiconductor device | Toshiro Hayakawa, Saburo Yamamoto | 1988-05-24 |
| 4745612 | Separate confinement heterostructure semiconductor laser device | Toshiro Hayakawa, Kohsei Takahashi, Masafumi Kondo, Saburo Yamamoto | 1988-05-17 |
| 4737959 | Semiconductor laser array device | Toshiro Hayakawa, Kohsei Takahashi, Saburo Yamamoto | 1988-04-12 |
| 4723253 | Semiconductor laser array | Toshiro Hayakawa, Saburo Yamamoto | 1988-02-02 |
| 4720833 | Semiconductor laser apparatus | Toshiro Hayakawa, Kohsei Takahashi, Saburo Yamamoto | 1988-01-19 |
| 4693207 | Apparatus for the growth of semiconductor crystals | Toshiro Hayakawa, Kohsei Takahashi, Saburo Yamamoto | 1987-09-15 |
| 4694460 | Stripe geometry semiconductor laser device | Toshiro Hayakawa, Saburo Yamamoto | 1987-09-15 |
| 4691214 | Optical semiconductor apparatus | Toshiro Hayakawa, Saburo Yamamoto | 1987-09-01 |
| 4637029 | Semiconductor laser | Toshiro Hayakawa, Nobuyuki Miyauchi, Seiki Yano | 1987-01-13 |
| 4569721 | Method for the production of semiconductor lasers | Toshiro Hayakawa, Nobuyuki Miyauchi, Seiki Yano | 1986-02-11 |
| 4567060 | Method of producing a semiconductor laser device | Toshiro Hayakawa, Saburo Yamamoto | 1986-01-28 |
| 4545057 | Window structure of a semiconductor laser | Toshiro Hayakawa, Nobuyuki Miyauchi, Seiki Yano | 1985-10-01 |