H01F 2007/1861
Using derivative of measured variable
Official title: {using derivative of measured variable}
H01F2007/1861 (Using derivative of measured variable) appears on 56 US grants and 49 published applications in this corpus.
Search patents in H01F- Granted patents
- 56
- Published applications
- 49
- Assignees
- 49
- Inventors
- 138
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 3 |
| 2007 | 1 | 1 |
| 2008 | 1 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 1 | 3 |
| 2014 | 1 | 2 |
| 2015 | 3 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 2 |
| 2018 | 1 | 2 |
| 2019 | 4 | 3 |
| 2020 | 2 | 8 |
| 2021 | 0 | 6 |
| 2022 | 9 | 5 |
| 2023 | 4 | 3 |
| 2024 | 5 | 4 |
| 2025 | 4 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Monitoring a health status of a solenoid3 Feb 2026US 12,540,686 B2Atlas Copco Airpower, Naamloze Vennootschap
- Device for monitoring operation of a solenoid valve and a method for monitoring operation of a solenoid valve30 Dec 2025US 12,510,185 B2Dtp Spolka Z Ograniczona Odpowiedzialnoscia
- Systems and methods for plunger movement detection11 Mar 2025US 12,247,853 B2Renesas Electronics America Inc.
- Test bench for a bulb of a contactor, associated test assembly and use of such a test bench11 Feb 2025US 12,224,117 B2Schneider Electric Industries SAS
- Method and apparatus for diagnosing abnormal state of valve7 Jan 2025US 12,188,576 B2Volvo Construction Equipment AB
- Method for determining the switching position of a directly controlled hydraulic valve, method for controlling a directly controlled hydraulic valve, hydraulic valve and hydraulic system11 Sep 2025US 2025/0283552 A1HAWE Hydraulik SE
- Hydraulic pressure control unit14 Aug 2025US 2025/0256692 A1Robert Bosch GmbH
- Valve control system and method19 Dec 2024US 2024/0418289 A1Raven Industries, Inc.
- A device for monitoring operation of a solenoid valve and a method for monitoring operation of a solenoid valve7 Nov 2024US 2024/0369156 A1Dtp Spolka Z Ograniczona Odpowiedzialnoscia
- Monitoring a health status of a solenoid1 Aug 2024US 2024/0255069 A1Atlas Copco Airpower, Naamloze Vennootschap
Most cited
By later US patents
- Method of operating an electromagnetically actuated fuel intake or exhaust valve of an internal combustion engine102US 4,823,825 A1989
- Method of identifying the impact of an armature onto an electromagnet on an electromagnetic switching arrangement85US 5,708,355 AFEV Motorentechnik GmbH · 1998
- Method and apparatus for determining the position of an armature in an electromagnetic actuator83US 5,481,187 ACaterpillar Inc. · 1996
- Method and apparatus for determining the position of an armature in an electromagnetic actuator by measuring the driving voltage frequency77US 5,600,237 ACaterpillar Inc. · 1997
- Variable reluctance actuator having position sensing and control49US 4,659,969 ASynektron Corporation · 1987