F02P 23/04
Ignition, other than compression ignition, for internal-combustion engines: other ignition: other physical
Official title: Other physical ignition means, e.g. using laser rays
F02P23/04 (Ignition, other than compression ignition, for internal-combustion engines: other ignition: other physical) appears on 494 US grants and 572 published applications in this corpus.
Search patents in F02P- Granted patents
- 494
- Published applications
- 572
- Assignees
- 148
- Inventors
- 671
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 6 | 4 |
| 2003 | 4 | 2 |
| 2004 | 5 | 6 |
| 2005 | 2 | 1 |
| 2006 | 3 | 10 |
| 2007 | 4 | 8 |
| 2008 | 9 | 10 |
| 2009 | 2 | 27 |
| 2010 | 15 | 39 |
| 2011 | 5 | 37 |
| 2012 | 19 | 51 |
| 2013 | 32 | 46 |
| 2014 | 58 | 80 |
| 2015 | 28 | 52 |
| 2016 | 51 | 45 |
| 2017 | 54 | 49 |
| 2018 | 60 | 40 |
| 2019 | 22 | 25 |
| 2020 | 28 | 15 |
| 2021 | 18 | 10 |
| 2022 | 9 | 7 |
| 2023 | 4 | 3 |
| 2024 | 6 | 2 |
| 2025 | 0 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pre-chamber ignition system and procedure for an internal combustion engine3 Mar 2026US 12,565,850 B2Marelli Europe S.P.A.
- Optical oscillator, method for designing optical oscillator, and laser device24 Feb 2026US 12,562,546 B2Inter-University Research Institute Corporation National Institutes of Natural Sciences
- Optical sensitizer device and method for low-energy laser ignition of propellants10 Dec 2024US 12,163,496 B2Purdue Research Foundation
- Method and apparatus for operating traveling spark igniter at high pressure3 Dec 2024US 12,158,132 B2Knite, Inc.
- Laser ignition device28 May 2024US 11,996,668 B2Denso Corporation
- Traveling spark igniter5 Mar 2026US 2026/0066621 A1Champion Aerospace Inc.
- Ignition system and control method19 Feb 2026US 2026/0049589 A1Clean Combustion Engine Technology Inc.
- Air/steam engine and use thereof25 Dec 2025US 2025/0389237 A1
- Optical sensitizer device and method for low-energy laser ignition of propellants28 Mar 2024US 2024/0102439 A1Purdue Research Foundation
- Pre-Chamber Ignition System and Procedure for an Internal Combustion Engine15 Feb 2024US 2024/0052772 A1Marelli Europe S.P.A.
Most cited
By later US patents
- Electromagnetic ignition--an ignition system producing a large size and intense capacitive and inductive spark with an intense electromagnetic field feeding the spark160US 4,774,914 ACombustion Electromagnetics, Inc. · 1988
- Corona source for producing corona discharge and fluid waste treatment with corona discharge107US 5,655,210 AHughes Aircraft Company · 1997
- Ignition methods and apparatus using microwave and laser energy99US 5,845,480 AUnison Industries Limited Partnership · 1998
- Laser-induced ignition system using a cavity78US 6,305,929 B1School of Mechanical and Aerospace Engineering, Seoul National University · 2001
- Combustion in an internal combustion engine71US 3,934,566 A1976