Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6471814 | Method of manufacturing plano lens | Hidetoshi Watanabe | 2002-10-29 |
| 6464367 | Surface light source system | Tomoya Yano | 2002-10-15 |
| 6342121 | Method of manufacturing plano lens | Hidetoshi Watanabe | 2002-01-29 |
| 6261402 | Planar type lens manufacturing method | Hidetoshi Watanabe | 2001-07-17 |
| 6262840 | Plano lens, rear-projection type projector screen employing the same, and rear-projection type video display apparatus | Hidetoshi Watanabe, Hirotsugu Suzuki, Koji Ashizaki, Takeshi Matsui, Shunichi Hashimoto | 2001-07-17 |
| 6172814 | Plano lens, rear-projection type projector screen employing the same, and rear-projection type video display apparatus | Hidetoshi Watanabe, Hirotsugu Suzuki, Koji Ashizaki, Takeshi Matsui, Shunichi Hashimoto | 2001-01-09 |
| 6096159 | Method of manufacturing plano lens | Hidetoshi Watanabe | 2000-08-01 |
| 5497065 | Inverter operation command process | — | 1996-03-05 |
| 5068777 | Pulse width modulation type inverter having temperature compensation | — | 1991-11-26 |
| 4716513 | Base drive circuit in a transistor inverter | — | 1987-12-29 |
| 4672285 | Inverter control circuit | — | 1987-06-09 |
| 4654773 | Inverter control circuit | Katsuhiko Chonan | 1987-03-31 |