F01L 9/20
Valve-gear or valve arrangements actuated non-mechanically: by electric means
Official title: by electric means
F01L9/20 (Valve-gear or valve arrangements actuated non-mechanically: by electric means) appears on 1,171 US grants and 834 published applications in this corpus.
Search patents in F01L- Granted patents
- 1,171
- Published applications
- 834
- Assignees
- 276
- Inventors
- 1,481
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 7 | 0 |
| 1988 | 9 | 0 |
| 1989 | 20 | 0 |
| 1990 | 19 | 0 |
| 1991 | 24 | 0 |
| 1992 | 18 | 0 |
| 1993 | 17 | 0 |
| 1994 | 13 | 0 |
| 1995 | 2 | 0 |
| 1996 | 10 | 0 |
| 1997 | 20 | 0 |
| 1998 | 39 | 0 |
| 1999 | 30 | 0 |
| 2000 | 55 | 0 |
| 2001 | 82 | 49 |
| 2002 | 100 | 84 |
| 2003 | 86 | 69 |
| 2004 | 65 | 61 |
| 2005 | 37 | 75 |
| 2006 | 81 | 63 |
| 2007 | 56 | 73 |
| 2008 | 46 | 50 |
| 2009 | 37 | 43 |
| 2010 | 31 | 16 |
| 2011 | 27 | 14 |
| 2012 | 20 | 18 |
| 2013 | 15 | 13 |
| 2014 | 5 | 15 |
| 2015 | 10 | 15 |
| 2016 | 16 | 35 |
| 2017 | 27 | 22 |
| 2018 | 21 | 17 |
| 2019 | 22 | 18 |
| 2020 | 14 | 21 |
| 2021 | 22 | 26 |
| 2022 | 17 | 13 |
| 2023 | 17 | 12 |
| 2024 | 8 | 2 |
| 2025 | 5 | 6 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Carrier-less spring loaded planetary gearset used with eVCT8 Sep 2026US 12,729,635 B2BorgWarner Inc.
- Camless reciprocating engine control system10 Mar 2026US 12,571,356 B2Adaptive Camless Technology, LLC
- Fast-acting toggling armature uses centring spring9 Dec 2025US 12,494,312 B2Cheesecake Energy Ltd.
- Engine brake system for an internal combustion engine2 Dec 2025US 12,486,807 B1GM Global Technology Operations LLC
- Clunk and shuffle management in multi-motor, multi-axle electrified drivetrains10 Jun 2025US 12,325,310 B2Ford Global Technologies, LLC
- Carrier-less spring loaded planetary gearset used with evct8 Oct 2026US 2026/0309063 A1BorgWarner Inc.
- Carrier-less spring loaded planetary gearset used with evct6 Aug 2026US 2026/0226852 A1BorgWarner Inc.
- Linear actor with optimized inductivity and method of winding and connecting coils18 Jun 2026US 2026/0166700 A1Technische Universitaet Wien
- Engine1 Jan 2026US 2026/0002454 A1Kubota Corporation
- Engine brake system for an internal combustion engine4 Dec 2025US 2025/0369398 A1GM Global Technology Operations LLC
Most cited
By later US patents
- Electromagnetic actuator889US 6,366,441 B1Honda Giken Kogyo Kabushiki Kaisha · 2002
- System and method for servo control of nonlinear electromagnetic actuators139US 6,208,497 B1Venture Scientifics, LLC · 2001
- Energization control method, and electromagnetic control system in electromagnetic driving device123US 5,636,601 AHonda Giken Kogyo Kabushiki Kaisha · 1997
- Method for the determination of glycated hemoglobin117US 7,005,273 B2TheraSense, Inc. · 2006
- Variable lift operation of bistable electromechanical poppet valve actuator104US 4,829,947 AGeneral Motors Corporation · 1989