F02B 75/12
Internal-combustion piston engines: other engines: other methods of operation
Official title: Other methods of operation
F02B75/12 (Internal-combustion piston engines: other engines: other methods of operation) appears on 1,733 US grants and 980 published applications in this corpus.
Search patents in F02B- Granted patents
- 1,733
- Published applications
- 980
- Assignees
- 332
- Inventors
- 2,427
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 12 | 0 |
| 1978 | 10 | 0 |
| 1979 | 5 | 0 |
| 1980 | 14 | 0 |
| 1981 | 9 | 0 |
| 1982 | 9 | 0 |
| 1983 | 6 | 0 |
| 1984 | 11 | 0 |
| 1985 | 14 | 0 |
| 1986 | 4 | 0 |
| 1987 | 15 | 0 |
| 1988 | 23 | 0 |
| 1989 | 17 | 0 |
| 1990 | 21 | 0 |
| 1991 | 18 | 0 |
| 1992 | 32 | 0 |
| 1993 | 38 | 0 |
| 1994 | 26 | 0 |
| 1995 | 16 | 0 |
| 1996 | 17 | 0 |
| 1997 | 19 | 0 |
| 1998 | 61 | 0 |
| 1999 | 79 | 0 |
| 2000 | 112 | 0 |
| 2001 | 121 | 50 |
| 2002 | 107 | 110 |
| 2003 | 132 | 106 |
| 2004 | 103 | 89 |
| 2005 | 82 | 56 |
| 2006 | 75 | 63 |
| 2007 | 51 | 58 |
| 2008 | 51 | 52 |
| 2009 | 27 | 56 |
| 2010 | 46 | 40 |
| 2011 | 41 | 40 |
| 2012 | 39 | 41 |
| 2013 | 41 | 43 |
| 2014 | 32 | 28 |
| 2015 | 28 | 32 |
| 2016 | 37 | 19 |
| 2017 | 28 | 11 |
| 2018 | 14 | 11 |
| 2019 | 10 | 18 |
| 2020 | 22 | 27 |
| 2021 | 19 | 9 |
| 2022 | 9 | 6 |
| 2023 | 6 | 5 |
| 2024 | 4 | 7 |
| 2025 | 2 | 3 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Stratified nitrogen enriched air (NEA) strategies and methods to reduce NOx emissions from engines12 May 2026US 12,624,654 B2Saudi Arabian Oil Company
- Engine having hotspot fuel igniter and piston and methodology using same3 Mar 2026US 12,565,865 B2Caterpillar Inc.
- Combustion chamber for high performance H2 direct injection engine2 Sep 2025US 12,404,802 B2Saudi Arabian Oil Company
- Internal combustion engine with spark plug and prechamber spark plug12 Aug 2025US 12,385,446 B2Robert Bosch GmbH
- Hydrogen intake assembly for a hydrogen internal combustion engine3 Sep 2024US 12,078,099 B2Volvo Truck Corporation
- Engine having hotspot fuel igniter and piston and methodology using same28 Aug 2025US 2025/0270969 A1Caterpillar Inc.
- Stratified nitrogen enriched air (nea) strategies and methods to reduce nox emissions from engines31 Jul 2025US 2025/0243799 A1Saudi Arabian Oil Company
- Cylinder head and an internal combustion engine system3 Jul 2025US 2025/0215822 A1Volvo Truck Corporation
- Method of combustion and fuel injection system for hydrogen gas12 Dec 2024US 2024/0410311 A1
- Combustion chamber for high performance h2 direct injection engine17 Oct 2024US 2024/0344479 A1Aramco Overseas Company B.V.
Most cited
By later US patents
- Flow meter567US 6,874,480 B1Combustion Dynamics Corp. · 2005
- Method and apparatus for operation of combustion engines205US 6,155,212 A2000
- Control system for two cycle direct injection engine and the method thereof165US 6,158,411 AFuji Jukogyo Kabushiki Kaisha · 2000
- Multiple fuel supply system for an internal combustion engine164US 4,031,864 AThe United States of America as represented by the United States Energy Research and Development Administration · 1977
- System and method for engine starting160US 7,159,568 B1Ford Global Technologies, LLC · 2007