F01L 1/44
Multiple-valve gear or arrangements, not provided for in preceding subgroups
Official title: Multiple-valve gear or arrangements, not provided for in preceding subgroups, e.g. with lift and different valves
F01L1/44 (Multiple-valve gear or arrangements, not provided for in preceding subgroups) appears on 50 US grants and 19 published applications in this corpus.
Search patents in F01L- Granted patents
- 50
- Published applications
- 19
- Assignees
- 23
- Inventors
- 82
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 2 | 4 |
| 2005 | 2 | 2 |
| 2006 | 1 | 1 |
| 2007 | 2 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Intake over intake engine21 Jul 2026US 12,687,135 B1
- Electro-hydrostatic actuator20 May 2025US 12,305,671 B2G. W. Lisk Company, Inc.
- Internal combustion engine6 Aug 2019US 10,371,020 B2Mahle International GmbH
- Intake and exhaust apparatus for four-stroke internal-combustion engine30 Jul 2013US 8,495,977 B2
- Engine for motorcycle13 Apr 2010US 7,694,657 B2Honda Motor Co., Ltd.
- Coaxial valve system16 Oct 2025US 2025/0320827 A1
- Electro-hydrostatic actuator4 Sep 2025US 2025/0277496 A1G. W. Lisk Company, Inc.
- Electro-hydrostatic actuator7 Dec 2023US 2023/0392616 A1G. W. Lisk Company, Inc.
- Ignition Piston 218 Nov 2021US 2021/0355858 A1
- Internal combustion engine21 Dec 2017US 2017/0362967 A1Mahle International GmbH
Most cited
By later US patents
- Internal combustion engine83US 6,279,550 B12001
- Cold air super-charged internal combustion engine, working cycle and method69US 6,951,211 B22005
- Internal combustion engine with intake manifold plenum and method of use41US 6,302,076 B12001
- Rotary valve and system for duration and phase control32US 5,105,784 AGeneral Motors Corporation · 1992
- Process for controlling self-ignition in a 4-stroke engine25US 6,082,342 AInstitut Francais du Petrole · 2000