F02F 1/4214
Specially adapted for four or more valves per cylinder
Official title: {specially adapted for four or more valves per cylinder}
F02F1/4214 (Specially adapted for four or more valves per cylinder) appears on 857 US grants and 198 published applications in this corpus.
Search patents in F02F- Granted patents
- 857
- Published applications
- 198
- Assignees
- 171
- Inventors
- 1,331
- Latest grant
- 12 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 3 | 0 |
| 1984 | 7 | 0 |
| 1985 | 27 | 0 |
| 1986 | 21 | 0 |
| 1987 | 47 | 0 |
| 1988 | 46 | 0 |
| 1989 | 39 | 0 |
| 1990 | 40 | 0 |
| 1991 | 34 | 0 |
| 1992 | 39 | 0 |
| 1993 | 35 | 0 |
| 1994 | 35 | 0 |
| 1995 | 28 | 0 |
| 1996 | 29 | 0 |
| 1997 | 34 | 0 |
| 1998 | 47 | 0 |
| 1999 | 43 | 0 |
| 2000 | 35 | 0 |
| 2001 | 35 | 16 |
| 2002 | 33 | 41 |
| 2003 | 40 | 17 |
| 2004 | 28 | 27 |
| 2005 | 26 | 11 |
| 2006 | 14 | 3 |
| 2007 | 4 | 5 |
| 2008 | 1 | 1 |
| 2009 | 3 | 7 |
| 2010 | 3 | 4 |
| 2011 | 1 | 4 |
| 2012 | 1 | 1 |
| 2013 | 3 | 1 |
| 2014 | 2 | 2 |
| 2015 | 4 | 4 |
| 2016 | 1 | 6 |
| 2017 | 5 | 3 |
| 2018 | 4 | 7 |
| 2019 | 2 | 17 |
| 2020 | 11 | 6 |
| 2021 | 7 | 3 |
| 2022 | 4 | 1 |
| 2023 | 6 | 5 |
| 2024 | 4 | 6 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Internal combustion engine with spark plug and prechamber spark plug12 Aug 2025US 12,385,446 B2Robert Bosch GmbH
- Cylinder head for a lean-burn gasoline engine18 Feb 2025US 12,228,092 B2Jaguar Land Rover Limited
- Air intake port for a lean-burn gasoline engine23 Jul 2024US 12,044,192 B2Jaguar Land Rover Limited
- Engine and vehicle having the same9 Apr 2024US 11,952,957 B2BYD Company Limited
- Internal combustion engine20 Feb 2024US 11,905,911 B2Toyota Jidosha Kabushiki Kaisha
- Internal Combustion Engine with Spark Plug and Prechamber Spark Plug11 Jul 2024US 2024/0229734 A9Robert Bosch GmbH
- A cylinder head for a lean-burn gasoline engine30 May 2024US 2024/0175406 A1Jaguar Land Rover Limited
- A piston for a lean-burn gasoline engine23 May 2024US 2024/0167431 A1Jaguar Land Rover Limited
- Air intake port for a lean-burn gasoline engine16 May 2024US 2024/0159199 A1Jaguar Land Rover Limited
- Internal Combustion Engine with Spark Plug and Prechamber Spark Plug25 Apr 2024US 2024/0133350 A1Robert Bosch GmbH
Most cited
By later US patents
- In-cylinder direct-injection spark-ignition engine98US 6,138,639 ANissan Motor Co., Ltd. · 2000
- Valve operating system for internal combustion engine80US 5,669,341 AHonda Giken Kogyo Kabushiki Kaisha · 1997
- Direct fuel injection type spark ignition internal combustion engine having a squish flow for assisting fuel evaporation75US 4,920,937 AToyota Jidosha Kabushiki Kaisha · 1990
- Variable compression ratio engine74US 5,682,854 AKomatsu Ltd. · 1997
- Combustion engine71US 6,213,086 B1AVL List GmbH · 2001