H01T 13/00
Sparking plugs
H01T13/00 (Sparking plugs) appears on 2,650 US grants and 2,021 published applications in this corpus.
Search patents in H01T- Granted patents
- 2,650
- Published applications
- 2,021
- Assignees
- 430
- Inventors
- 2,728
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 24 | 0 |
| 1977 | 29 | 0 |
| 1978 | 27 | 0 |
| 1979 | 10 | 0 |
| 1980 | 17 | 0 |
| 1981 | 20 | 0 |
| 1982 | 25 | 0 |
| 1983 | 28 | 0 |
| 1984 | 28 | 0 |
| 1985 | 25 | 0 |
| 1986 | 11 | 0 |
| 1987 | 21 | 0 |
| 1988 | 20 | 0 |
| 1989 | 31 | 0 |
| 1990 | 41 | 0 |
| 1991 | 24 | 0 |
| 1992 | 32 | 0 |
| 1993 | 34 | 0 |
| 1994 | 31 | 0 |
| 1995 | 39 | 0 |
| 1996 | 39 | 0 |
| 1997 | 30 | 0 |
| 1998 | 44 | 0 |
| 1999 | 45 | 0 |
| 2000 | 39 | 0 |
| 2001 | 53 | 18 |
| 2002 | 51 | 64 |
| 2003 | 59 | 46 |
| 2004 | 61 | 52 |
| 2005 | 38 | 71 |
| 2006 | 51 | 55 |
| 2007 | 48 | 73 |
| 2008 | 35 | 61 |
| 2009 | 36 | 85 |
| 2010 | 70 | 86 |
| 2011 | 68 | 96 |
| 2012 | 99 | 122 |
| 2013 | 104 | 122 |
| 2014 | 136 | 150 |
| 2015 | 120 | 111 |
| 2016 | 125 | 100 |
| 2017 | 125 | 142 |
| 2018 | 140 | 129 |
| 2019 | 109 | 100 |
| 2020 | 108 | 91 |
| 2021 | 90 | 53 |
| 2022 | 51 | 47 |
| 2023 | 58 | 54 |
| 2024 | 60 | 53 |
| 2025 | 35 | 21 |
| 2026 | 6 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01T 13/20Sparking plugs: characterised by features of the electrodes or insulation1,549
- H01T 13/02Details815
- H01T 13/40Structurally combined with other devices390
- H01T 13/46Sparking plugs: having two or more spark gaps276
- H01T 13/54Sparking plugs: having electrodes arranged in a partly-enclosed ignition chamber253
- H01T 13/50Sparking plugs: having means for ionisation of gap234
- H01T 13/52Sparking plugs: characterised by a discharge along a surface131
- H01T 13/58Testing114
Recent patents
- Spark plug with ground electrode in a recess on housing end side30 Jun 2026US 12,671,233 B2Robert Bosch GmbH
- Spark plug having a small inter-electrode distance and an at least partly negative spark position9 Jun 2026US 12,651,891 B2Robert Bosch GmbH
- Ignition system and igniter having ruthenium ground electrode and platinum-iridium alloy center electrode12 May 2026US 12,627,118 B2Champion Aerospace Inc.
- Spark plug with a sealing earth electrode21 Apr 2026US 12,609,512 B2Robert Bosch GmbH
- Pre-chamber ignition system and procedure for an internal combustion engine3 Mar 2026US 12,565,850 B2Marelli Europe S.P.A.
- Spark plug inspection assembly8 Oct 2026US 2026/0312373 A1
- Spark plug24 Sep 2026US 2026/0291185 A1Niterra Co., Ltd.
- Spark plug with tapered breathing space3 Sep 2026US 2026/0261100 A1
- Spark Plug, Spark Plug Sleeve And Spark Plug Assembly For A Gas Engine27 Aug 2026US 2026/0251087 A1Caterpillar Energy Solutions GmbH
- Spark plug with improved ground electrode27 Aug 2026US 2026/0254204 A1
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
- Hand-held ignition voltage tester118US 6,396,278 B12002
- Spark plug110US 6,495,948 B1Pyrotek Enterprises, Inc. · 2002
- Miniature railgun engine ignitor92US 5,211,142 ABoard of Regents, The University of Texas System · 1993