H02M 5/297
For conversion of frequency
Official title: for conversion of frequency
H02M5/297 (For conversion of frequency) appears on 222 US grants and 245 published applications in this corpus.
Search patents in H02M- Granted patents
- 222
- Published applications
- 245
- Assignees
- 138
- Inventors
- 436
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 4 | 5 |
| 2004 | 2 | 5 |
| 2005 | 3 | 1 |
| 2006 | 2 | 0 |
| 2007 | 2 | 5 |
| 2008 | 0 | 7 |
| 2009 | 8 | 6 |
| 2010 | 3 | 9 |
| 2011 | 3 | 9 |
| 2012 | 8 | 14 |
| 2013 | 11 | 13 |
| 2014 | 10 | 22 |
| 2015 | 16 | 25 |
| 2016 | 19 | 16 |
| 2017 | 20 | 16 |
| 2018 | 21 | 6 |
| 2019 | 9 | 10 |
| 2020 | 7 | 5 |
| 2021 | 9 | 20 |
| 2022 | 12 | 10 |
| 2023 | 11 | 7 |
| 2024 | 8 | 7 |
| 2025 | 7 | 10 |
| 2026 | 8 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- AC-to-AC converter having higher output frequency6 Oct 2026US 12,756,326 B2Dyson Technology Limited
- Modular multi-level AC-AC converter11 Aug 2026US 12,706,548 B2
- Dual stage AC to AC electrical power converters16 Jun 2026US 12,658,814 B2Rampx Holdings, Inc.
- Method for operating a converter, converter and computer program product9 Jun 2026US 12,651,973 B2Hitachi Energy Ltd
- Power supply and demand synchronization system and method for modular multi-port system26 May 2026US 12,640,568 B2DG Matrix, Inc.
- Resonant power conversion systems and methods2 Jul 2026US 2026/0189151 A1B. G. Negev Technologies and Applications Ltd.
- Ac-to-ac converter2 Jul 2026US 2026/0189152 A1Dyson Technology Limited
- Protection circuits configured for use with microinverters18 Jun 2026US 2026/0171898 A1Enphase Energy, Inc.
- Systems and methods for switching pattern for power converter18 Jun 2026US 2026/0171921 A1BorgWarner Inc.
- Inverter and control method for sending pwm driver gating signal18 Jun 2026US 2026/0171929 A1Huawei Digital Power Technologies Co., Ltd.
Most cited
By later US patents
- Inverter device and air conditioner including the same505US 8,884,560 B2Mitsubishi Electric Corporation · 2014
- Phase modulated switchmode power amplifier and waveform generator220US 4,479,175 AHoneywell Inc. · 1984
- Variable speed wind turbine having a matrix converter159US 6,566,764 B2Vestas Wind Systems A/S, R&D · 2003
- Frequency doubler circuit and method112US 4,648,021 AMotorola, Inc. · 1987
- Electronic device for electrical energy conversion between a voltage source and a current source by means of controllable switching cells102US 5,737,201 A1998