Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5327282 | Optical amplifier for 1.3 .mu.m band | Keiko Takeda, Kenji Tagawa | 1994-07-05 |
| 5276549 | Optical transmitter including rare earth-doped fiber | Kenji Tagawa, Keiko Takeda, Osamu Oyama | 1994-01-04 |