Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8344654 | Driving circuit for and semiconductor device for driving laser diode | Takehiko Umeyama | 2013-01-01 |
| 8098023 | Driving circuit for and semiconductor device for driving laser diode | Takehiko Umeyama | 2012-01-17 |
| 7791288 | Driving circuit for and semiconductor device for driving laser diode | Takehiko Umeyama | 2010-09-07 |
| 7372882 | Driving circuit for and semiconductor device for driving laser diode | Takehiko Umeyama | 2008-05-13 |
| 6731449 | Magnetic recording writing circuit | Yasuhiro Okazaki, Takehiko Umeyama, Hiroshi Murakami | 2004-05-04 |