H01T 13/50
Sparking plugs: having means for ionisation of gap
Official title: having means for ionisation of gap (H01T13/52 takes precedence)
H01T13/50 (Sparking plugs: having means for ionisation of gap) appears on 234 US grants and 235 published applications in this corpus.
Search patents in H01T- Granted patents
- 234
- Published applications
- 235
- Assignees
- 61
- Inventors
- 276
- Latest grant
- 25 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 4 |
| 2003 | 4 | 1 |
| 2004 | 1 | 2 |
| 2005 | 2 | 3 |
| 2006 | 3 | 3 |
| 2007 | 2 | 6 |
| 2008 | 2 | 4 |
| 2009 | 1 | 17 |
| 2010 | 11 | 11 |
| 2011 | 8 | 14 |
| 2012 | 14 | 20 |
| 2013 | 13 | 13 |
| 2014 | 22 | 31 |
| 2015 | 10 | 18 |
| 2016 | 16 | 21 |
| 2017 | 25 | 25 |
| 2018 | 26 | 17 |
| 2019 | 14 | 10 |
| 2020 | 12 | 9 |
| 2021 | 8 | 3 |
| 2022 | 2 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Spark igniter with magnetic field for pushing spark25 Feb 2025US 12,237,649 B2Pratt & Whitney Canada Corp.
- Method and apparatus for operating traveling spark igniter at high pressure3 Dec 2024US 12,158,132 B2Knite, Inc.
- Corona ignition device with improved electrical performance17 Jan 2023US 11,557,882 B2Tenneco Inc.
- Combustion environment diagnostics22 Nov 2022US 11,506,169 B2West Virginia University
- Method and apparatus for operating traveling spark igniter at high pressure16 Aug 2022US 11,419,204 B2Knite, Inc.
- Igniter3 Oct 2024US 2024/0332915 A1Pratt & Whitney Canada Corp.
- Method and apparatus for operating traveling spark igniter at high pressure13 Apr 2023US 2023/0114936 A1Knite, Inc.
- Method and apparatus for operating traveling spark igniter at high pressure27 Jan 2022US 2022/0030694 A1Knite, Inc.
- Corona ignition device with improved electrical performance18 Nov 2021US 2021/0359494 A1Tenneco Inc.
- Combustion Environment Diagnostics7 Oct 2021US 2021/0310457 A1West Virginia University
Most cited
By later US patents
- Enhanced flame ignition for hydrocarbon fuels134US 4,841,925 ACombustion Electromagnetics, Inc. · 1989
- Plasma jet ignition engine and method122US 4,203,393 AFord Motor Company · 1980
- Miniature railgun engine ignitor92US 5,211,142 ABoard of Regents, The University of Texas System · 1993
- Combustion enhancement system and method87US 6,745,744 B22004
- Miniature railgun engine ignitor77US 5,076,223 ABoard of Regents, The University of Texas System · 1991