F01L 2003/251
Large number of valves
Official title: {Large number of valves, e.g. five or more}
F01L2003/251 (Large number of valves) appears on 38 US grants and 14 published applications in this corpus.
Search patents in F01L- Granted patents
- 38
- Published applications
- 14
- Assignees
- 13
- Inventors
- 55
- Latest grant
- 22 Aug 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 2 | 1 |
| 2006 | 1 | 0 |
| 2007 | 1 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 2 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Multi-valve22 Aug 2023US 11,732,621 B2Dr. Ing. h,c.F. Porsche Aktiengesellschaft
- Enhanced piston for improving the efficiency of an internal combustion engine13 Apr 2021US 10,975,798 B2
- Control device for internal combustion engine23 Oct 2018US 10,107,147 B2Toyota Jidosha Kabushiki Kaisha
- High expansion ratio internal combustion engine15 Apr 2014US 8,695,544 B2Toyota Jidosha Kabushiki Kaisha
- Internal combustion engine with five valves per cylinder13 May 2008US 7,370,618 B2
- Multi-valve27 Oct 2022US 2022/0341350 A1Dr. Ing. h,c.F. Porsche Aktiengesellschaft
- Scavenger Valve Method and Device23 Dec 2021US 2021/0396163 A1Compressor Engineering Corporation
- Enhanced piston for improving the efficiency of an internal combustion engine18 Feb 2021US 2021/0047982 A1
- Scavenger Valve Method and Device19 Sep 2019US 2019/0284970 A1Compressor Engineering Corporation
- Control device for internal combustion engine11 Jan 2018US 2018/0010486 A1Toyota Jidosha Kabushiki Kaisha
Most cited
By later US patents
- Cold air super-charged internal combustion engine, working cycle and method69US 6,951,211 B22005
- Four-stroke Otto engine having hybrid control51US 5,647,312 AFEV Motorentechnik GmbH & Co. Kommanditgesellschaft · 1997
- Valve actuating structure for multi-valve engine25US 5,758,612 AYamaha Hatsudoki Kabushiki Kaisha · 1998
- Valve train for internal combustion engine23US 5,570,665 AChrysler Corporation · 1996
- Camshaft bearing arrangement for overhead cam engine20US 4,612,885 AYamaha Hatsudoki Kabushiki Kaisha · 1986