H02N 2/14
Drive circuits
Official title: Drive circuits; Control arrangements {or methods}
H02N2/14 (Drive circuits) appears on 453 US grants and 322 published applications in this corpus.
Search patents in H02N- Granted patents
- 453
- Published applications
- 322
- Assignees
- 128
- Inventors
- 562
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 8 | 0 |
| 1990 | 8 | 0 |
| 1991 | 10 | 0 |
| 1992 | 14 | 0 |
| 1993 | 10 | 0 |
| 1994 | 7 | 0 |
| 1995 | 14 | 0 |
| 1996 | 12 | 0 |
| 1997 | 11 | 0 |
| 1998 | 14 | 0 |
| 1999 | 15 | 0 |
| 2000 | 20 | 0 |
| 2001 | 15 | 4 |
| 2002 | 18 | 14 |
| 2003 | 9 | 11 |
| 2004 | 7 | 10 |
| 2005 | 8 | 13 |
| 2006 | 13 | 13 |
| 2007 | 7 | 10 |
| 2008 | 10 | 6 |
| 2009 | 5 | 9 |
| 2010 | 9 | 9 |
| 2011 | 6 | 15 |
| 2012 | 6 | 8 |
| 2013 | 8 | 14 |
| 2014 | 8 | 12 |
| 2015 | 14 | 19 |
| 2016 | 18 | 15 |
| 2017 | 11 | 14 |
| 2018 | 13 | 15 |
| 2019 | 13 | 13 |
| 2020 | 12 | 17 |
| 2021 | 17 | 28 |
| 2022 | 23 | 13 |
| 2023 | 21 | 17 |
| 2024 | 10 | 8 |
| 2025 | 10 | 8 |
| 2026 | 4 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Vibration actuator controller18 Aug 2026US 12,708,928 B2Canon Kabushiki Kaisha
- Drive control device and ultrasonic motor system14 Apr 2026US 12,599,932 B2Murata Manufacturing Co., Ltd.
- Vibration-type drive apparatus, and drive method for vibration-type drive apparatus17 Feb 2026US 12,556,112 B2Canon Kabushiki Kaisha
- Piezoelectric actuator for deformable lens13 Jan 2026US 12,523,866 B1Apple Inc.
- Drive device and imaging apparatus16 Dec 2025US 12,498,540 B2FUJIFILM Corporation
- Apparatus and methods for image-guided robotic surgical interventions10 Sep 2026US 2026/0266924 A1Worcester Polytechnic Institute
- Piezoelectric inertia drive3 Sep 2026US 2026/0261219 A1Physik Instrumente (Pi) GmbH & Co. KG
- Single-electrode normalized setting circuit of ultrasonic motor6 Aug 2026US 2026/0230007 A1Nanjing Hang Da Chao Kong Technology Co., Ltd.
- Control apparatus and vibration driving apparatus9 Jul 2026US 2026/0196950 A1Canon Kabushiki Kaisha
- Control device and robot14 May 2026US 2026/0135497 A1Seiko Epson Corporation
Most cited
By later US patents
- Circuit and method of driving an ultrasonic motor to method for driving an ultrasonic motor318US 5,214,339 AASMO Co.LTD · 1993
- Device and method for driving symmetric load systems139US 6,465,931 B2QorTek, Inc. · 2002
- Piezoelectric actuator83US 4,928,030 ARockwell International Corporation · 1990
- Piezoelectric motor81US 5,872,418 API Ceramic GmbH · 1999
- Circuitry for driving ultrasonic motor78US 4,952,834 AOlympus Optical Co., Ltd. · 1990