Issued Patents All Time
Showing 25 most recent of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12057710 | System and methods of a non-contact feeding device providing constant output voltage to a power receiving device | Goro Nakao, Yusuke Kawai, Atsushi Nomura | 2024-08-06 |
| 12040627 | Non-contact power feeding device | Goro Nakao | 2024-07-16 |
| 11967892 | DC power supply device and servo DC power supply system | Takeshi Kiribuchi, Takeshi Ashida, Masashi Doi | 2024-04-23 |
| 11750129 | Servo DC power supply system and motor control device | Takeshi Kiribuchi, Takeshi Ashida, Masashi Doi | 2023-09-05 |
| 11329513 | Contactless power transmission apparatus | Goro Nakao, Yusuke Kawai, Atsushi Nomura, Takeshi Uematsu | 2022-05-10 |
| 11245291 | Non-contact power supply device capable of performing constant voltage output operation | Goro Nakao, Yusuke Kawai | 2022-02-08 |
| 11190058 | Non-contact power supply device and method for abnormal stop | Goro Nakao, Yusuke Kawai, Atsushi Nomura | 2021-11-30 |
| 11171516 | Noncontact power supply apparatus | Atsushi Nomura, Goro Nakao, Yusuke Kawai | 2021-11-09 |
| 11139693 | Contactless power transmission apparatus | Goro Nakao, Yusuke Kawai, Atsushi Nomura | 2021-10-05 |
| 11128173 | Noncontact power supply apparatus | Goro Nakao | 2021-09-21 |
| 11121587 | Non-contact power supply device capable of performing constant voltage output operation | Goro Nakao, Yusuke Kawai, Atsushi Nomura | 2021-09-14 |
| 11108273 | Contactless power transmission apparatus with stable bidirectional power transmission | Goro Nakao, Atsushi Nomura, Yusuke Kawai | 2021-08-31 |
| 11095160 | Non-contact power supply device | Goro Nakao, Yusuke Kawai, Atsushi Nomura | 2021-08-17 |
| 11081906 | Contactless power transmission apparatus | Goro Nakao, Atsushi Nomura, Yusuke Kawai | 2021-08-03 |
| 10984945 | Transformer and resonant circuit having same | Shingo NAGAOKA, Yutaro Okuno, Sadaharu Morishita | 2021-04-20 |
| 10944293 | Noncontact power supply apparatus | Goro Nakao | 2021-03-09 |
| 10797528 | Non-contact feeding device | Goro Nakao, Yusuke Kawai, Atsushi Nomura | 2020-10-06 |
| 6888728 | Switching power supply unit | Masakazu Takagi, Junichi Yamamoto, Katsuhiko Shimizu | 2005-05-03 |
| 6683797 | Multi-stage DC—DC converter | Masakazu Takagi | 2004-01-27 |
| 6650552 | Switching power supply unit with series connected converter circuits | Masakazu Takagi, Junichi Yamamoto, Katsuhiko Shimizu | 2003-11-18 |
| 6535407 | DC/DC converter having a piezoelectric transformer and rectification-smoothing circuit | — | 2003-03-18 |
| 5969954 | AC/DC converter with a piezoelectric transformer | — | 1999-10-19 |
| 5805432 | Resonant DC-DC converter capable of controlling by pulse width modulation | Tamotsu Ninomiya | 1998-09-08 |
| 5768111 | Converter comprising a piezoelectric transformer and a switching stage of a resonant frequency different from that of the transformer | — | 1998-06-16 |
| 5739622 | Converter wherein a piezoelectric transformer input signal is frequency modulated by a pulse width modulated signal | — | 1998-04-14 |