Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860297 | Quantum well semiconductor laser device | Toshiro Hayakawa, Takahiro Suyama, Masafumi Kondo, Saburo Yamamoto | 1989-08-22 |
| 4841533 | Semiconductor laser device having a graded index waveguide | Toshiro Hayakawa, Takahiro Suyama, Masafumi Kondo, Saburo Yamamoto | 1989-06-20 |
| 4835783 | Semiconductor laser | Takahiro Suyama, Toshiro Hayakawa, Masafumi Kondo, Saburo Yamamoto | 1989-05-30 |
| 4824518 | Method for the production of semiconductor devices | Toshiro Hayakawa, Takahiro Suyama, Saburo Yamamoto | 1989-04-25 |
| 4806994 | Semiconductor device | Toshiro Hayakawa, Takahiro Suyama, Saburo Yamamoto | 1989-02-21 |
| 4807235 | Semiconductor laser device | Takahiro Suyama, Saburo Yamamoto, Toshiro Hayakawa, Masafumi Kondo | 1989-02-21 |