Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10802078 | Current monitoring circuit and coulomb counter circuit | Takahiro Shimizu | 2020-10-13 |
| 10186959 | Power supply circuit, control circuit thereof, and electronic apparatus | Masashi Horimoto | 2019-01-22 |
| 10101399 | Apparatus for estimating residual battery capacity, system for estimating residual battery capacity, battery pack, and method for estimating residual battery capacity | — | 2018-10-16 |
| 8159797 | Overvoltage protection circuit | — | 2012-04-17 |
| 8143815 | DC/DC converter | Isao Yamamoto | 2012-03-27 |
| 8134106 | Current detection circuit | Satoru Nate, Isao Yamamoto | 2012-03-13 |
| 8044639 | Selector circuit | Ichiro Yokomizo, Hironori Nakahara | 2011-10-25 |
| 7994737 | Drive circuit of DC/DC converter, light emitting apparatus and electronic device using the same | Isao Yamamoto | 2011-08-09 |
| 7960955 | Power supply device, electronic device using the same, and semiconductor device | Tomoyuki Ito, Koki Tamakawa, Isao Yamamoto | 2011-06-14 |
| 7924540 | Over-voltage protection circuit | — | 2011-04-12 |
| 7894717 | Control circuit for self exciting DC/DC converter | Satoru Nate, Isao Yamamoto | 2011-02-22 |
| 7863833 | DC/DC converter control circuit, and power supply apparatus, light emitting apparatus and electronic device using the same | Isao Yamamoto, Kyoichiro Araki | 2011-01-04 |
| 7781988 | DC/DC converter | Isao Yamamoto | 2010-08-24 |
| 7579784 | Switching power supply and its control circuit, and electronic apparatus employing such switching power supply | Kyoichiro Araki, Isao Yamamoto | 2009-08-25 |
| 7368884 | DC/DC converter | Isao Yamamoto | 2008-05-06 |
| 7253596 | Power supply apparatus capable of supplying a stable converted voltage | Isao Yamamoto | 2007-08-07 |
| 7248002 | Light emission control apparatus and light emission control method with temperature-sensitive driving current control | Isao Yamamoto | 2007-07-24 |
| 7190195 | Input circuit and output circuit | Isao Yamamoto, Kyoichiro Araki | 2007-03-13 |