Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12119742 | Integrated circuit and method of digitally controling critical mode power factor correction circuit | Osamu Ohtake | 2024-10-15 |
| 12113436 | Integrated circuit and method of synchronous rectification control of bridgeless power factor correction circuit | Osamu Ohtake | 2024-10-08 |
| 10910952 | Control apparatus and method for current resonance circuit and current resonance power supply | Osamu Ohtake | 2021-02-02 |
| 10608526 | Device and method for calculating switching time | Osamu Ohtake | 2020-03-31 |
| 9871455 | Current resonance type power supply device | Osamu Ohtake | 2018-01-16 |
| 9774262 | Current resonance type power supply device | Osamu Ohtake | 2017-09-26 |
| 9716427 | Power factor correction circuit having bottom skip controller | Osamu Ohtake, Youichi Terasawa | 2017-07-25 |
| 9641088 | Current resonant power source apparatus | Osamu Ohtake | 2017-05-02 |
| 9444352 | Current resonance type power supply device | Osamu Ohtake | 2016-09-13 |
| 9025348 | Drive circuit | Keiichiro Ozawa, Akio Iwabuchi, Yasushi Tasaka | 2015-05-05 |
| 7764089 | Device for driving switching elements | Akio Iwabuchi, Yoichi Kyono | 2010-07-27 |
| 7567443 | Power converter | Toshitaka Shiga | 2009-07-28 |
| 7492614 | Switching power supply apparatus | Akio Iwabuchi | 2009-02-17 |
| 7382633 | DC converter | Shinji Aso, Osamu Ohtake | 2008-06-03 |
| 7330365 | Synchronous commutation DC-DC converter | Hiroshi Usui, Yukinari Fukumoto | 2008-02-12 |
| 7203080 | DC converter | Shinji Aso | 2007-04-10 |
| 7154762 | Power source apparatus | Mizuki Utsuno | 2006-12-26 |