F01L 1/38
For engines with other than four-stroke cycle
Official title: for engines with other than four-stroke cycle, e.g. with two-stroke cycle (F01L1/26, F01L1/28 take precedence)
F01L1/38 (For engines with other than four-stroke cycle) appears on 116 US grants and 103 published applications in this corpus.
Search patents in F01L- Granted patents
- 116
- Published applications
- 103
- Assignees
- 61
- Inventors
- 215
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 3 |
| 2003 | 3 | 0 |
| 2004 | 1 | 5 |
| 2005 | 3 | 4 |
| 2006 | 7 | 4 |
| 2007 | 2 | 5 |
| 2008 | 5 | 3 |
| 2009 | 3 | 4 |
| 2010 | 4 | 8 |
| 2011 | 2 | 2 |
| 2012 | 3 | 8 |
| 2013 | 2 | 0 |
| 2014 | 7 | 4 |
| 2015 | 5 | 5 |
| 2016 | 3 | 4 |
| 2017 | 2 | 4 |
| 2018 | 6 | 6 |
| 2019 | 5 | 8 |
| 2020 | 9 | 5 |
| 2021 | 5 | 6 |
| 2022 | 7 | 5 |
| 2023 | 4 | 2 |
| 2024 | 3 | 2 |
| 2025 | 5 | 5 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Internal combustion engine25 Nov 2025US 12,480,457 B2
- Engine and method of operating the same30 Sep 2025US 12,429,003 B2Alpha-Otto Technologies Inc.
- Multi-cylinder internal combustion engine, with cylinders equipped with intake valve variable actuation systems having hydraulic circuits which cross each other11 Mar 2025US 12,247,502 B2C. R. F. Societa Consortile per Azioni
- Internal combustion engine18 Feb 2025US 12,228,091 B1
- Reed valve14 Jan 2025US 12,196,329 B2Moto Tassinari, Inc.
- Engine and method of operating the same1 Jan 2026US 2026/0002480 A1Alpha-Otto Technologies Inc.
- Reed valve13 Nov 2025US 2025/0347346 A1Moto Tassinari, Inc.
- Internal combustion engine15 May 2025US 2025/0154921 A1
- Engine and method of operating the same27 Mar 2025US 2025/0101925 A1Alpha-Otto Technologies Inc.
- Exhaust valve controller for two-stroke engines13 Feb 2025US 2025/0052206 A1Arctic Cat Inc.
Most cited
By later US patents
- 6-cycle engine with regenerator168US 8,186,334 B22012
- Process and apparatus for compression release engine retarding producing two compression release events per cylinder per engine cycle103US 4,572,114 AThe Jacobs Manufacturing Company · 1986
- Four-cycle internal combustion engines with two-cycle compression release braking69US 5,537,976 ADiesel Engine Retarders, Inc. · 1996
- Multi-cycle, engine braking with positive power valve actuation control system and process for using the same65US 6,000,374 ADiesel Engine Retarders, Inc. · 1999
- System and method for reducing vehicle acceleration during engine transitions49US 7,426,915 B2Ford Global Technologies, LLC · 2008