Tokunaga; Norikazu
Patent Applications and Registrations
Patent applications and USPTO patent grants for Tokunaga; Norikazu.The latest application filed is for "power supply with uninterruptible function".
- Tokunaga; Norikazu - Hitachi JP
- Tokunaga, Norikazu - Hitachi-shi JP
| Patent | Date |
|---|---|
| Backup power supply Grant 7,157,810 - Kanouda , et al. January 2, 2 | 2007-01-02 |
| Power supply with uninterruptible function Grant 7,053,502 - Aihara , et al. May 30, 2 | 2006-05-30 |
| Backup power supply Grant 6,977,448 - Kanouda , et al. December 20, 2 | 2005-12-20 |
| Power supply with uninterruptible function App 20050078494 - Aihara, Nobuyuki ; et al. | 2005-04-14 |
| Power supply with uninterruptible function Grant 6,795,322 - Aihara , et al. September 21, 2 | 2004-09-21 |
| Backup power supply App 20040145926 - Kanouda, Akihiko ; et al. | 2004-07-29 |
| Parallel power source system Grant 6,738,270 - Saga , et al. May 18, 2 | 2004-05-18 |
| DC power supply device Grant 6,643,152 - Tokunaga , et al. November 4, 2 | 2003-11-04 |
| DC-DC converter and a method of controlling thereof App 20030197494 - Kanouda, Akihiko ; et al. | 2003-10-23 |
| Backup power supply App 20030184937 - Kanouda, Akihiko ; et al. | 2003-10-02 |
| Synchronized rectifier voltage step down DC-DC converter and control circuit therefor Grant 6,603,671 - Tokunaga , et al. August 5, 2 | 2003-08-05 |
| DC power supply device App 20030107906 - Tokunaga, Norikazu ; et al. | 2003-06-12 |
| Voltage Regulator Module For Micro Processor And Cpo Using A Super Capacitor App 20030042878 - Kanouda, Akihiko ; et al. | 2003-03-06 |
| Dc-dc Step-down Converter With An Electric Double-layer Capacitor App 20030039092 - Kanouda, Akihiko ; et al. | 2003-02-27 |
| DC power supply device Grant 6,507,507 - Tokunaga , et al. January 14, 2 | 2003-01-14 |
| Backup power supply App 20020186576 - Kanouda, Akihiko ; et al. | 2002-12-12 |
| DC-DC converter and a method of controlling thereof App 20020185994 - Kanouda, Akihiko ; et al. | 2002-12-12 |
| DC-DC converter with switchable control mode Grant 6,489,756 - Kanouda , et al. December 3, 2 | 2002-12-03 |
| DC-DC converter and control circuit therefor App 20020136030 - Tokunaga, Norikazu ; et al. | 2002-09-26 |
| DC-DC converter App 20020080631 - Kanouda, Akihiko ; et al. | 2002-06-27 |
| Parallel power source system App 20020074862 - Saga, Ryohei ; et al. | 2002-06-20 |
| Power Supply With Uninterrupted Function App 20020071292 - AIHARA, NOBUYUKI ; et al. | 2002-06-13 |
| DC power supply device App 20020067630 - Tokunaga, Norikazu ; et al. | 2002-06-06 |
| Method of driving semiconductor switching device in non-saturated state and power supply apparatus containing such a switching device Grant 6,381,152 - Takahashi , et al. April 30, 2 | 2002-04-30 |
| Direct-current power-supply apparatus, control circuit thereof and semiconductor integrated circuit device for power supply App 20010026462 - Tokunaga, Norikazu ; et al. | 2001-10-04 |
| Inverter apparatus and uinterruptible power supply using the same Grant 5,446,645 - Shirahama , et al. August 29, 1 | 1995-08-29 |
| Power supply control system Grant 5,297,015 - Miyazaki , et al. March 22, 1 | 1994-03-22 |
| Parallel circuit module including a diode and an IGBT Grant 5,274,541 - Kimura , et al. December 28, 1 | 1993-12-28 |
| Parallel inverter control apparatus Grant 5,262,935 - Shirahama , et al. November 16, 1 | 1993-11-16 |
| Circuit for controlling an electric power supply apparatus, a method therefor and an uninterruptible power supply Grant 5,115,386 - Shirahama , et al. May 19, 1 | 1992-05-19 |
| Switching power supply Grant 4,933,830 - Sato , et al. June 12, 1 | 1990-06-12 |
| Pulse width modulated inverter with high-to-low frequency output converter Grant 4,878,163 - Yamato , et al. October 31, 1 | 1989-10-31 |
| Switching power supply Grant 4,777,575 - Yamato , et al. October 11, 1 | 1988-10-11 |
| Semiconductor switching device having plural MOSFET's, GTO's or the like connected in series Grant 4,692,643 - Tokunaga , et al. September 8, 1 | 1987-09-08 |
| Power supply apparatus for resistance welder including means for preventing polarized transformer excitation Grant 4,306,138 - Tokunaga , et al. December 15, 1 | 1981-12-15 |
| Inverter control apparatus Grant 4,122,516 - Tokunaga October 24, 1 | 1978-10-24 |
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