Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890293 | Semiconductor laser device | Mototaka Taneya, Toshiro Hayakawa, Sadayoshi Matsui, Mitsuhiro Matsumoto, Hiroyuki Hosoba | 1989-12-26 |
| 4887274 | Deterioration-resistant superlattice semiconductor laser device | Toshiro Hayakawa, Takahiro Suyama, Masafumi Kondo | 1989-12-12 |
| 4862470 | Semiconductor laser device | Takahiro Suyama, Masafumi Kondo, Toshiro Hayakawa | 1989-08-29 |
| 4852111 | Semiconductor laser device | Toshiro Hayakawa, Takahiro Suyama, Masafumi Kondo | 1989-07-25 |
| 4845724 | Semiconductor laser device having optical guilding layers of unequal resistance | Toshiro Hayakawa, Takahiro Suyama, Masafumi Kondo | 1989-07-04 |