Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8681826 | Method for tuning semiconductor laser | Hirokazu Tanaka, Tsutomu Ishikawa | 2014-03-25 |
| 7929581 | Testing method of wavelength-tunable laser, controlling method of wavelength-tunable laser and laser device | Tsutomu Ishikawa, Hirokazu Tanaka | 2011-04-19 |
| 7812594 | Optical device and method of controlling the same | Tsutomu Ishikawa, Hirokazu Tanaka | 2010-10-12 |
| 7813391 | Method of controlling semiconductor laser | Hirokazu Tanaka, Tsutomu Ishikawa | 2010-10-12 |
| 6487027 | Optical semiconductor module having a capability of temperature regulation | Yasuyuki Yamauchi, Nobuhiro Ninomiya | 2002-11-26 |