H01F 7/1653
Magnetic circuit having axially spaced pole-pieces
Official title: {Magnetic circuit having axially spaced pole-pieces}
H01F7/1653 (Magnetic circuit having axially spaced pole-pieces) appears on 34 US grants and 13 published applications in this corpus.
Search patents in H01F- Granted patents
- 34
- Published applications
- 13
- Assignees
- 18
- Inventors
- 58
- Latest grant
- 11 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 2 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 2 |
| 2019 | 3 | 2 |
| 2020 | 2 | 0 |
| 2021 | 1 | 2 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Electromagnetic actuator and use thereof11 Feb 2025US 12,224,116 B2Nakanishi Jaeger GmbH
- Electromagnetic valve6 Sep 2022US 11,435,007 B2GEA Tuchenhagen GmbH
- Electronic devices with fabric actuators7 Dec 2021US 11,194,396 B1Apple Inc.
- Electromechanical solenoid having a pole piece alignment member4 Aug 2020US 10,734,147 B2HUSCO Automotive Holdings LLC
- Haptic electromagnetic actuator5 May 2020US 10,642,361 B2Apple Inc.
- Electromagnetic actuator and use thereof18 May 2023US 2023/0154660 A1Alfred Jäger GmbH
- Electromagnetic Valve9 Dec 2021US 2021/0381618 A1GEA Tuchenhagen GmbH
- Electromagnetic actuator4 Nov 2021US 2021/0343462 A1Denso Corporation
- Long stroke linear solenoid20 Jun 2019US 2019/0189323 A1GM Global Technology Operations LLC
- Haptic actuator including field member multi-dimensional position determined based upon coil back electromotive force and motor constant values and related methods7 Mar 2019US 2019/0073034 A1Apple Inc.
Most cited
By later US patents
- Actuator detection method and apparatus for an electromechanical actuator36US 5,257,014 ACaterpillar Inc. · 1993
- Electromagnetic force valve driving apparatus28US 5,069,422 AIsuzu Ceramics Research Institute Co., Ltd. · 1991
- Fuel injection pumps23US 4,116,591 ALucas Industries Limited · 1978
- Fuel pump injector22US 4,164,203 ALucas Industries Limited · 1979
- Valve stepping drive apparatus16US 4,984,541 AIsuzu Ceramics Research Institute Co., Ltd. · 1991