F01L 2001/0537
Double overhead camshafts [dohc]
Official title: {Double overhead camshafts [DOHC]}
F01L2001/0537 (Double overhead camshafts [dohc]) appears on 1,087 US grants and 967 published applications in this corpus.
Search patents in F01L- Granted patents
- 1,087
- Published applications
- 967
- Assignees
- 203
- Inventors
- 1,755
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 10 | 0 |
| 1988 | 9 | 0 |
| 1989 | 5 | 0 |
| 1990 | 14 | 0 |
| 1991 | 14 | 0 |
| 1992 | 16 | 0 |
| 1993 | 10 | 0 |
| 1994 | 6 | 0 |
| 1995 | 8 | 0 |
| 1996 | 9 | 0 |
| 1997 | 15 | 0 |
| 1998 | 21 | 0 |
| 1999 | 13 | 0 |
| 2000 | 14 | 0 |
| 2001 | 21 | 9 |
| 2002 | 36 | 39 |
| 2003 | 30 | 24 |
| 2004 | 30 | 47 |
| 2005 | 46 | 44 |
| 2006 | 28 | 34 |
| 2007 | 32 | 55 |
| 2008 | 39 | 52 |
| 2009 | 27 | 53 |
| 2010 | 40 | 50 |
| 2011 | 43 | 40 |
| 2012 | 43 | 33 |
| 2013 | 41 | 31 |
| 2014 | 27 | 29 |
| 2015 | 34 | 32 |
| 2016 | 19 | 41 |
| 2017 | 40 | 79 |
| 2018 | 67 | 65 |
| 2019 | 63 | 59 |
| 2020 | 70 | 50 |
| 2021 | 50 | 36 |
| 2022 | 29 | 21 |
| 2023 | 17 | 13 |
| 2024 | 18 | 14 |
| 2025 | 13 | 8 |
| 2026 | 4 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Engine assembly oil management14 Jul 2026US 12,680,519 B2Arctic Cat Inc.
- Variable valve device24 Mar 2026US 12,584,426 B2Suzuki Motor Corporation
- Oil pan for internal combustion engine3 Mar 2026US 12,565,852 B2Arctic Cat Inc.
- Interchangeable engine assembly10 Feb 2026US 12,546,270 B2Arctic Cat Inc.
- Internal combustion engine25 Nov 2025US 12,480,457 B2
- Engine13 Aug 2026US 2026/0235053 A1Ishikawa Energy Research Co., Ltd.
- Engine comprising a camshaft timing gear30 Jul 2026US 2026/0218631 A1Lombardini S.R.L.
- Variable valve timing mechanism23 Jul 2026US 2026/0210276 A1Subaru Corporation
- Camshaft mounting structure9 Jul 2026US 2026/0193996 A1Toyota Jidosha Kabushiki Kaisha
- Oil pan for internal combustion engine9 Jul 2026US 2026/0194004 A1Arctic Cat Inc.
Most cited
By later US patents
- Internal combustion engine102US 4,805,571 AHumphrey Cycle Engine Partners, L.P. · 1989
- Marine hulls and drives97US 7,984,684 B22011
- Variable camshaft timing for internal combustion engine95US 5,107,804 ABorg-Warner Automotive Transmission & Engine Components Corporation · 1992
- Variable camshaft timing for internal combustion engine93US 5,002,023 ABorg-Warner Automotive, Inc. · 1991
- Dual-acting apparatus for variable valve timing and the like87US 5,417,186 AClemson University · 1995