H02N 2/147
Multi-phase circuits
Official title: {Multi-phase circuits}
H02N2/147 (Multi-phase circuits) appears on 92 US grants and 36 published applications in this corpus.
Search patents in H02N- Granted patents
- 92
- Published applications
- 36
- Assignees
- 34
- Inventors
- 132
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 10 | 0 |
| 2001 | 10 | 1 |
| 2002 | 3 | 3 |
| 2003 | 1 | 2 |
| 2004 | 3 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 3 |
| 2007 | 1 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 2 |
| 2011 | 2 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2018 | 1 | 3 |
| 2019 | 1 | 4 |
| 2020 | 1 | 4 |
| 2021 | 2 | 2 |
| 2022 | 6 | 2 |
| 2023 | 4 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Vibration driving device for a strong magnetic-field environment4 Nov 2025US 12,463,560 B2Canon Kabushiki Kaisha
- Piezoelectric resonator and drive device19 Sep 2023US 11,764,704 B2Seiko Epson Corporation
- Vibration actuator having plural vibrators and inductors15 Aug 2023US 11,728,750 B2Canon Kabushiki Kaisha
- Lens barrel and imaging device28 Feb 2023US 11,594,985 B2Nikon Corporation
- Vibration actuator and driving device for vibration actuator21 Feb 2023US 11,588,417 B2Canon Kabushiki Kaisha
- Control apparatus and vibration driving apparatus9 Jul 2026US 2026/0196950 A1Canon Kabushiki Kaisha
- Drive circuit for an ultrasonic motor12 Dec 2024US 2024/0413768 A1Seagate Technology LLC
- Piezoelectric resonator and drive device24 Nov 2022US 2022/0376635 A1Seiko Epson Corporation
- Vibration driving device18 Aug 2022US 2022/0263432 A1Canon Kabushiki Kaisha
- Lens barrel and imaging device2 Sep 2021US 2021/0273586 A1Nikon Corporation
Most cited
By later US patents
- Piezoelectric motor81US 5,872,418 API Ceramic GmbH · 1999
- Circuitry for driving ultrasonic motor78US 4,952,834 AOlympus Optical Co., Ltd. · 1990
- Vibration wave motor56US 4,513,219 ACanon Kabushiki Kaisha · 1985
- Vibration wave motor54US 4,833,358 ACanon Kabushiki Kaisha · 1989
- Drive system for a vibration wave motor for lens control49US 4,560,263 ACanon Kabushiki Kaisha · 1985