F02B 75/02
Engines characterised by their cycles
Official title: Engines characterised by their cycles, e.g. six-stroke
F02B75/02 (Engines characterised by their cycles) appears on 6,518 US grants and 1,711 published applications in this corpus.
Search patents in F02B- Granted patents
- 6,518
- Published applications
- 1,711
- Assignees
- 1,172
- Inventors
- 7,300
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 119 | 0 |
| 1977 | 113 | 0 |
| 1978 | 118 | 0 |
| 1979 | 102 | 0 |
| 1980 | 119 | 0 |
| 1981 | 114 | 0 |
| 1982 | 122 | 0 |
| 1983 | 133 | 0 |
| 1984 | 186 | 0 |
| 1985 | 163 | 0 |
| 1986 | 148 | 0 |
| 1987 | 192 | 0 |
| 1988 | 193 | 0 |
| 1989 | 213 | 0 |
| 1990 | 250 | 0 |
| 1991 | 237 | 0 |
| 1992 | 234 | 0 |
| 1993 | 251 | 0 |
| 1994 | 229 | 0 |
| 1995 | 217 | 0 |
| 1996 | 275 | 0 |
| 1997 | 226 | 0 |
| 1998 | 245 | 0 |
| 1999 | 216 | 0 |
| 2000 | 222 | 0 |
| 2001 | 237 | 89 |
| 2002 | 221 | 205 |
| 2003 | 213 | 166 |
| 2004 | 140 | 138 |
| 2005 | 111 | 64 |
| 2006 | 91 | 57 |
| 2007 | 48 | 47 |
| 2008 | 42 | 42 |
| 2009 | 31 | 50 |
| 2010 | 25 | 50 |
| 2011 | 26 | 53 |
| 2012 | 33 | 50 |
| 2013 | 28 | 38 |
| 2014 | 49 | 66 |
| 2015 | 62 | 71 |
| 2016 | 48 | 70 |
| 2017 | 63 | 84 |
| 2018 | 70 | 53 |
| 2019 | 69 | 83 |
| 2020 | 61 | 61 |
| 2021 | 53 | 43 |
| 2022 | 59 | 41 |
| 2023 | 43 | 35 |
| 2024 | 31 | 21 |
| 2025 | 21 | 20 |
| 2026 | 6 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Valve system for two-stroke engine4 Aug 2026US 12,698,744 B2GM Global Technology Operations LLC
- Fuel reforming system28 Jul 2026US 12,692,828 B2Mazda Motor Corporation
- Engine control system and methods7 Jul 2026US 12,674,434 B2Arctic Cat Inc.
- Port assembly for 2-stroke diesel engine9 Jun 2026US 12,650,106 B2DeltaHawk Engines, Inc.
- Stratified nitrogen enriched air (NEA) strategies and methods to reduce NOx emissions from engines12 May 2026US 12,624,654 B2Saudi Arabian Oil Company
- Two-cycle engine with scavaging passage8 Oct 2026US 2026/0309071 A1Maruyama Mfg.Co., Inc.
- Engine control system and methods8 Oct 2026US 2026/0309111 A1Arctic Cat Inc.
- Two stroke apposed pistons parallel cylinders internal combustion engine1 Oct 2026US 2026/0298132 A1
- Axial internal combustion engine10 Sep 2026US 2026/0266215 A1
- Engine13 Aug 2026US 2026/0235053 A1Ishikawa Energy Research Co., Ltd.
Most cited
By later US patents
- Methods for identifying nucleic acid ligands856US 5,270,163 AUniversity Research Corporation · 1993
- Nucleic acid ligands561US 5,475,096 AUniversity Research Corporation · 1995
- Opposed piston internal combustion engine with inviscid layer sealing470US 9,909,492 B2Prime Group Alliance, LLC · 2018
- Man machine interface446US 4,570,217 A1986
- Solution phase nucleic acid sandwich assays having reduced background noise406US 5,635,352 AChiron Corporation · 1997