H01T 13/54
Sparking plugs: having electrodes arranged in a partly-enclosed ignition chamber
Official title: having electrodes arranged in a partly-enclosed ignition chamber
H01T13/54 (Sparking plugs: having electrodes arranged in a partly-enclosed ignition chamber) appears on 253 US grants and 220 published applications in this corpus.
Search patents in H01T- Granted patents
- 253
- Published applications
- 220
- Assignees
- 75
- Inventors
- 376
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 8 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 3 |
| 2003 | 3 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 4 |
| 2006 | 3 | 4 |
| 2007 | 1 | 5 |
| 2008 | 0 | 2 |
| 2009 | 2 | 9 |
| 2010 | 8 | 2 |
| 2011 | 1 | 8 |
| 2012 | 5 | 11 |
| 2013 | 6 | 7 |
| 2014 | 11 | 5 |
| 2015 | 6 | 7 |
| 2016 | 8 | 9 |
| 2017 | 8 | 11 |
| 2018 | 11 | 13 |
| 2019 | 6 | 13 |
| 2020 | 25 | 24 |
| 2021 | 21 | 9 |
| 2022 | 15 | 18 |
| 2023 | 27 | 24 |
| 2024 | 21 | 17 |
| 2025 | 11 | 3 |
| 2026 | 2 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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 with small spark gap and flat ignition element surfaces25 Nov 2025US 12,483,007 B2Robert Bosch GmbH
- Pre-chamber assembly21 Oct 2025US 12,448,913 B2Innio Jenbacher GmbH & Co OG
- Pre-chamber spark plug having improved heating management26 Aug 2025US 12,401,173 B2Robert Bosch GmbH
- 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
- Prechamber Ignition Means for an Internal Combustion Engine and Engine Having Same20 Aug 2026US 2026/0243191 A1Bayerische Motoren Werke Aktiengesellschaft
- Spark plug with insertion aid for a laterally introduced ground electrode23 Jul 2026US 2026/0213498 A1
Most cited
By later US patents
- Combustion control system for internal combustion engines67US 4,736,718 A1988
- Precombustion chamber device64US 5,554,908 A1996
- Plasma fuel ignitors61US 4,332,223 A1982
- Swirl chamber and spark plug assembly58US 4,930,473 ATexas Ignitors Company, Inc. · 1990
- System and device for the ignition of an internal combustion engine using a lean air-fuel mixture56US 4,041,922 ATokai TRW & Co., Ltd. · 1977