H02N 2/142
Small signal circuits
Official title: {Small signal circuits; Means for controlling position or derived quantities, e.g. speed, torque, starting, stopping, reversing}
H02N2/142 (Small signal circuits) appears on 270 US grants and 185 published applications in this corpus.
Search patents in H02N- Granted patents
- 270
- Published applications
- 185
- Assignees
- 66
- Inventors
- 322
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 5 | 0 |
| 1991 | 6 | 0 |
| 1992 | 10 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 9 | 0 |
| 1996 | 10 | 0 |
| 1997 | 8 | 0 |
| 1998 | 10 | 0 |
| 1999 | 9 | 0 |
| 2000 | 11 | 0 |
| 2001 | 9 | 2 |
| 2002 | 8 | 7 |
| 2003 | 4 | 4 |
| 2004 | 2 | 7 |
| 2005 | 6 | 10 |
| 2006 | 9 | 8 |
| 2007 | 5 | 8 |
| 2008 | 6 | 3 |
| 2009 | 5 | 6 |
| 2010 | 5 | 5 |
| 2011 | 3 | 11 |
| 2012 | 4 | 3 |
| 2013 | 7 | 10 |
| 2014 | 3 | 7 |
| 2015 | 9 | 5 |
| 2016 | 12 | 9 |
| 2017 | 3 | 10 |
| 2018 | 7 | 10 |
| 2019 | 6 | 6 |
| 2020 | 11 | 12 |
| 2021 | 9 | 11 |
| 2022 | 13 | 6 |
| 2023 | 15 | 10 |
| 2024 | 5 | 6 |
| 2025 | 1 | 6 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Vibration-type drive apparatus, and drive method for vibration-type drive apparatus17 Feb 2026US 12,556,112 B2Canon Kabushiki Kaisha
- Drive device and imaging apparatus16 Dec 2025US 12,498,540 B2FUJIFILM Corporation
- Optical element driving mechanism24 Dec 2024US 12,174,444 B2TDK Taiwan Corp.
- Vibration wave motor and imaging apparatus and electronic apparatus including vibration wave motor19 Nov 2024US 12,149,187 B2Canon Kabushiki Kaisha
- Vibration actuator control apparatus23 Apr 2024US 11,967,914 B2Canon Kabushiki Kaisha
- 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
- Lens barrel and imaging device27 Nov 2025US 2025/0364924 A1Nikon Corporation
- Vibration type driving device2 Oct 2025US 2025/0309789 A1
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
- 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
- Piezoelectric actuator for optical alignment screws68US 5,410,206 ANew Focus, Inc. · 1995