H01F 7/1811
Demagnetising upon switching off, removing residual magnetism
Official title: {demagnetising upon switching off, removing residual magnetism}
H01F7/1811 (Demagnetising upon switching off, removing residual magnetism) appears on 69 US grants and 64 published applications in this corpus.
Search patents in H01F- Granted patents
- 69
- Published applications
- 64
- Assignees
- 56
- Inventors
- 174
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 2 | 5 |
| 2005 | 1 | 6 |
| 2006 | 5 | 4 |
| 2007 | 2 | 4 |
| 2008 | 4 | 1 |
| 2009 | 1 | 7 |
| 2010 | 2 | 2 |
| 2011 | 5 | 2 |
| 2012 | 0 | 4 |
| 2013 | 3 | 1 |
| 2014 | 2 | 0 |
| 2015 | 2 | 4 |
| 2016 | 1 | 1 |
| 2017 | 1 | 1 |
| 2018 | 1 | 2 |
| 2019 | 2 | 2 |
| 2020 | 2 | 3 |
| 2021 | 2 | 5 |
| 2022 | 6 | 0 |
| 2023 | 1 | 2 |
| 2024 | 2 | 3 |
| 2025 | 2 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Method and circuitry for controlling discharge of a solenoid valve6 Jan 2026US 12,518,901 B2Scania CV AB
- Load drive device and method for controlling electronic control device21 Oct 2025US 12,451,281 B2Hitachi Astemo, Ltd.
- Power dumping driver for magnetic actuator25 Feb 2025US 12,237,108 B2Smart Wires Inc.
- Control device and method for contactor22 Oct 2024US 12,125,652 B2Schneider Electric Industries SAS
- Circuit and method for driving an inductive load with reduced power loss13 Aug 2026US 2026/0237548 A1
- Solenoid controller17 Jul 2025US 2025/0232903 A1LG Innotek Co., Ltd.
- Electronic circuit for actuating an electromagnetic linear actuator5 Jun 2025US 2025/0182943 A1Murrelektronik GmbH
- Switch arrangement and method for operating a switch arrangement8 May 2025US 2025/0149275 A1Siemens Aktiengesellschaft
- Method and circuitry for controlling discharge of a solenoid valve18 Jul 2024US 2024/0242867 A1Scania CV AB
Most cited
By later US patents
- Solenoid-operated valve actuating controller34US 7,813,101 B2SMC Corporation · 2010
- Solenoid valve driving circuit and solenoid valve31US 7,903,383 B2SMC Corporation · 2011
- Circuit for controlling an electromagnet20US 4,473,862 ALucas Industries Limited · 1984
- Rapid response dual coil electromagnetic actuator with capacitor18US 5,363,270 AGeneral Motors Corporation · 1994
- PWM solenoid driver and method18US 6,061,224 ABurr-Brown Corporation · 2000