F02B 2075/027
Four
Official title: {four}
F02B2075/027 (Four) appears on 3,152 US grants and 669 published applications in this corpus.
Search patents in F02B- Granted patents
- 3,152
- Published applications
- 669
- Assignees
- 680
- Inventors
- 4,005
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 77 | 0 |
| 1977 | 72 | 0 |
| 1978 | 54 | 0 |
| 1979 | 55 | 0 |
| 1980 | 63 | 0 |
| 1981 | 54 | 0 |
| 1982 | 58 | 0 |
| 1983 | 63 | 0 |
| 1984 | 109 | 0 |
| 1985 | 92 | 0 |
| 1986 | 82 | 0 |
| 1987 | 102 | 0 |
| 1988 | 81 | 0 |
| 1989 | 99 | 0 |
| 1990 | 91 | 0 |
| 1991 | 98 | 0 |
| 1992 | 102 | 0 |
| 1993 | 120 | 0 |
| 1994 | 99 | 0 |
| 1995 | 119 | 0 |
| 1996 | 155 | 0 |
| 1997 | 138 | 0 |
| 1998 | 134 | 0 |
| 1999 | 118 | 0 |
| 2000 | 118 | 0 |
| 2001 | 121 | 54 |
| 2002 | 121 | 131 |
| 2003 | 124 | 74 |
| 2004 | 83 | 74 |
| 2005 | 49 | 27 |
| 2006 | 41 | 25 |
| 2007 | 20 | 15 |
| 2008 | 15 | 15 |
| 2009 | 10 | 11 |
| 2010 | 4 | 10 |
| 2011 | 7 | 10 |
| 2012 | 7 | 9 |
| 2013 | 6 | 11 |
| 2014 | 7 | 5 |
| 2015 | 12 | 15 |
| 2016 | 8 | 12 |
| 2017 | 22 | 36 |
| 2018 | 20 | 26 |
| 2019 | 27 | 22 |
| 2020 | 16 | 24 |
| 2021 | 26 | 22 |
| 2022 | 27 | 15 |
| 2023 | 12 | 14 |
| 2024 | 8 | 6 |
| 2025 | 5 | 5 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- Systems and methods for extra-stroke engine cycle operation5 Aug 2025US 12,378,910 B1Caterpillar Inc.
- Misfire detection apparatus and misfire detection method for multi-cylinder engine5 Aug 2025US 12,378,926 B2Honda Motor Co., Ltd.
- Internal combustion engine system25 Feb 2025US 12,234,780 B2Volvo Truck Corporation
- Outboard engine assembly11 Feb 2025US 12,221,921 B1BRP US Inc.
- Ssr1 autocycle dual motor hybrid12 Mar 2026US 2026/0070626 A1
- Fuel reforming system21 Aug 2025US 2025/0264076 A1Mazda Motor Corporation
- Stratified nitrogen enriched air (nea) strategies and methods to reduce nox emissions from engines31 Jul 2025US 2025/0243799 A1Saudi Arabian Oil Company
- 4-stroke 3-cylinder engine17 Apr 2025US 2025/0122817 A1Polaris Industries Inc.
- Engine Mounting Systems for Snowmobiles13 Mar 2025US 2025/0083770 A1Arctic Cat Inc.
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
- Solution phase nucleic acid sandwich assays having reduced background noise406US 5,635,352 AChiron Corporation · 1997
- Core computer processor module, and peripheral shell module assembled to form a pocket size data capture unit402US 5,227,614 ANorand Corporation · 1993
- Uninterruptible power system402US 5,602,462 ABest Power Technology, Inc. · 1997