F02M 21/04
Gas-air mixing apparatus
F02M21/04 (Gas-air mixing apparatus) appears on 346 US grants and 254 published applications in this corpus.
Search patents in F02M- Granted patents
- 346
- Published applications
- 254
- Assignees
- 169
- Inventors
- 625
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 8 | 0 |
| 1984 | 9 | 0 |
| 1985 | 9 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 10 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 8 | 0 |
| 1997 | 7 | 0 |
| 1998 | 7 | 0 |
| 1999 | 9 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 4 | 5 |
| 2003 | 6 | 3 |
| 2004 | 6 | 10 |
| 2005 | 8 | 2 |
| 2006 | 4 | 5 |
| 2007 | 1 | 7 |
| 2008 | 5 | 10 |
| 2009 | 3 | 14 |
| 2010 | 5 | 9 |
| 2011 | 10 | 6 |
| 2012 | 1 | 11 |
| 2013 | 3 | 13 |
| 2014 | 12 | 18 |
| 2015 | 16 | 28 |
| 2016 | 10 | 23 |
| 2017 | 18 | 9 |
| 2018 | 18 | 5 |
| 2019 | 10 | 8 |
| 2020 | 10 | 14 |
| 2021 | 11 | 10 |
| 2022 | 14 | 7 |
| 2023 | 14 | 15 |
| 2024 | 11 | 8 |
| 2025 | 11 | 6 |
| 2026 | 2 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fuel bypass system for gaseous-fueled engine12 May 2026US 12,624,655 B2Generac Power Systems, Inc.
- Ammonia-fueled engine based on oxygen enhancement and ammonia-rich combustion control method thereof12 May 2026US 12,624,673 B2Tianjin University
- Supplemental fuel system for compression-ignition engine30 Dec 2025US 12,510,043 B2American CNG, LLC
- Systems and methods for methane number calculation9 Dec 2025US 12,492,965 B2Caterpillar Inc.
- Integrated throttle—fuel mixer18 Nov 2025US 12,473,866 B2Generac Power Systems, Inc.
- Micromixer for combustor, combustor including same and method of mixing tube repair27 Aug 2026US 2026/0251107 A1GE Infrastructure Technology LLC
- Engine and operating strategy augmenting tumble flow to increase fuel-air mixing30 Jul 2026US 2026/0218671 A1Caterpillar Inc.
- Hydrogen internal combustion engine with injection ring25 Jun 2026US 2026/0177023 A1Ferrari S.P. A.
- Integrated throttle - fuel mixer18 Jun 2026US 2026/0168448 A1Generac Power Systems, Inc.
- Fuel admission mixer for fumigated engine system18 Jun 2026US 2026/0168468 A1Caterpillar Inc.
Most cited
By later US patents
- Bi-fuel control system and retrofit assembly for diesel engines231US 6,543,395 B2Gas Technologies LLC · 2003
- Apparatus and methods for providing natural gas to multiple engines disposed upon multiple carriers166US 9,187,982 B2Baker Hughes Incorporated · 2015
- Operating techniques for internal combustion engines116US 6,408,625 B1Cummins Engine Company, Inc. · 2002
- Swirl chamber91US 4,726,686 A1988
- Internal combustion engine dual fuel system73US 4,335,697 A1982