F02M 31/135
Fuel-air mixture
F02M31/135 (Fuel-air mixture) appears on 169 US grants and 66 published applications in this corpus.
Search patents in F02M- Granted patents
- 169
- Published applications
- 66
- Assignees
- 73
- Inventors
- 260
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 13 | 0 |
| 1983 | 18 | 0 |
| 1984 | 11 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 9 | 0 |
| 1993 | 2 | 0 |
| 1994 | 7 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 2 |
| 2002 | 0 | 2 |
| 2003 | 4 | 6 |
| 2004 | 3 | 9 |
| 2005 | 7 | 8 |
| 2006 | 4 | 0 |
| 2007 | 1 | 5 |
| 2008 | 2 | 1 |
| 2009 | 2 | 4 |
| 2010 | 0 | 2 |
| 2011 | 3 | 1 |
| 2012 | 2 | 2 |
| 2013 | 1 | 0 |
| 2014 | 2 | 3 |
| 2015 | 2 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 3 |
| 2018 | 3 | 1 |
| 2019 | 1 | 2 |
| 2020 | 0 | 2 |
| 2021 | 2 | 1 |
| 2022 | 2 | 3 |
| 2023 | 5 | 4 |
| 2024 | 2 | 0 |
| 2025 | 1 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Reconfigurable surgical frame and method for use thereof26 May 2026US 12,637,993 B2Warsaw Orthopedic, Inc.
- Internal combustion engine as a chemical reactor to produce synthesis gas from hydrocarbon feeds16 Sep 2025US 12,416,271 B2Research Triangle Institute
- Reconfigurable surgical frame and method for use thereof22 Oct 2024US 12,123,381 B2Warsaw Orthopedic, Inc.
- Systems and methods for a fuel vapor canister heating element30 Apr 2024US 11,970,998 B2Ford Global Technologies, LLC
- Thermal choke, autostart generator system, and method of use thereof23 May 2023US 11,655,779 B2The Dewey Electronics Corporation
- Thermal choke, autostart generator system, and method of use thereof18 Jun 2026US 2026/0168466 A1The Dewey Electronics Corporation
- Internal combustion engine26 Feb 2026US 2026/0055722 A1
- Engine device18 Sep 2025US 2025/0290473 A1Yanmar Holdings Co., Ltd.
- Reconfigurable surgical frame and method for use thereof3 Apr 2025US 2025/0109725 A1Warsaw Orthopedic, Inc.
- Internal combustion engine as a chemical reactor to produce synthesis gas from hydrocarbon feeds19 Oct 2023US 2023/0332553 A1Research Triangle Institute
Most cited
By later US patents
- Air-fuel ratio control method for an internal combustion engine having spark plugs with heaters61US 5,044,331 AHonda Motor Co., Ltd. · 1991
- Cold start engine control apparatus and method59US 5,894,832 AHitachi America, Ltd., Research and Development Division · 1999
- Intake air control device and internal combustion engine mounting the same50US 6,543,412 B2Hitachi Car Engineering Co., Ltd. · 2003
- High efficiency early fuel evaporation carburetion system40US 4,108,125 ATexas Instruments Incorporated · 1978
- Electric fuel heating device40US 4,870,249 ATexas Instruments Incorporated · 1989