Issued Patents All Time
Showing 25 most recent of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12166419 | Control circuit of boost DC-DC converter, power supply circuit, and electronic device | Shun Fukushima, Tomohisa Shinozaki | 2024-12-10 |
| 12081125 | Control circuit of DC/DC converter, power supply circuit, and electronic device | Shun Fukushima, Tomohisa Shinozaki | 2024-09-03 |
| 12057775 | Current detection circuit, synchronous rectification type DC/DC buck converter and control circuit thereof | — | 2024-08-06 |
| 12003181 | Buck DC/DC converter, controller thereof and controlling method thereof, and electronic device | — | 2024-06-04 |
| 11936298 | Drive circuit of high-side transistor, switching circuit, and controller of DC/DC converter | — | 2024-03-19 |
| 10389339 | Device and method for controlling slew rate | Tetsuro Hashimoto | 2019-08-20 |
| 8912777 | Control circuit and control method for switching power supply, and switching power supply and electronic apparatus using control circuit and control method | — | 2014-12-16 |
| 8786247 | Charging circuit | Tadayuki Sakamoto | 2014-07-22 |
| 8716995 | Control circuit for switching power supply | — | 2014-05-06 |
| 7888926 | Step-down type switching regulator | — | 2011-02-15 |
| 7868598 | Switching regulator | — | 2011-01-11 |
| 7759917 | Power supply unit and portable apparatus using the same | — | 2010-07-20 |
| 7576529 | Step-down type switching regulator | — | 2009-08-18 |
| 7397151 | Power supply unit and portable apparatus using the same | — | 2008-07-08 |
| RE36151 | Turning control system for use in a track-laying vehicle | Ryoichi Maruyama, Hideki Yamada | 1999-03-16 |
| 5684694 | System for controlling a hydrostatic-mechanical transmission when an oil pressure exceeds a relief pressure | Ryoichi Maruyama, Yuichi Nagahiro | 1997-11-04 |
| 5671137 | Response control system for hydrostatic-mechanical transmissions | Ryoichi Maruyama, Shingo Ota | 1997-09-23 |
| 5622050 | System for controlling a hydrostatic-mechanical transmission at the time of vehicle acceleration or deceleration | Ryoichi Maruyama, Takashi Noda | 1997-04-22 |
| 5611405 | Turning speed control system for use in a track-laying vehicle | Ryoichi Maruyama, Hideki Yamada | 1997-03-18 |
| 5540051 | Control mechanism for hydrostatic-mechanical power transmission system | Ryoichi Maruyama, Hideki Yamada | 1996-07-30 |
| 5535840 | Steering system for use in a track-laying vehicle | Ryoichi Maruyama, Hideki Yamada | 1996-07-16 |
| 5531304 | Creep preventing control system for hydrostatic-mechanical transmissions | Ryoichi Maruyama, Hiroshi Nakagami, Hisao Asada | 1996-07-02 |
| 5529546 | Forward/reverse drive and stop control system for hydrostatic -mechanical transmissions | Ryoichi Maruyama, Akinobu Takada, Keita Muto | 1996-06-25 |
| 5524436 | Overrun protecting control system for hydrostatic-mechanical transmissions | Ryoichi Maruyama, Mamoru Hatano | 1996-06-11 |
| 5522775 | Speed change gear control system for hydrostatic-mechanical transmissions | Ryoichi Maruyama | 1996-06-04 |