H01T 13/46
Sparking plugs: having two or more spark gaps
Official title: having two or more spark gaps
H01T13/46 (Sparking plugs: having two or more spark gaps) appears on 276 US grants and 197 published applications in this corpus.
Search patents in H01T- Granted patents
- 276
- Published applications
- 197
- Assignees
- 97
- Inventors
- 425
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 6 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 7 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 6 | 1 |
| 2002 | 3 | 9 |
| 2003 | 11 | 2 |
| 2004 | 4 | 3 |
| 2005 | 1 | 8 |
| 2006 | 2 | 11 |
| 2007 | 9 | 5 |
| 2008 | 3 | 4 |
| 2009 | 4 | 10 |
| 2010 | 5 | 4 |
| 2011 | 4 | 8 |
| 2012 | 9 | 9 |
| 2013 | 10 | 15 |
| 2014 | 7 | 16 |
| 2015 | 12 | 7 |
| 2016 | 14 | 8 |
| 2017 | 8 | 10 |
| 2018 | 13 | 10 |
| 2019 | 8 | 14 |
| 2020 | 8 | 10 |
| 2021 | 11 | 5 |
| 2022 | 6 | 8 |
| 2023 | 16 | 11 |
| 2024 | 6 | 6 |
| 2025 | 4 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Spark plug having a small inter-electrode distance and an at least partly negative spark position9 Jun 2026US 12,651,891 B2Robert Bosch GmbH
- Spark plug with a sealing earth electrode21 Apr 2026US 12,609,512 B2Robert Bosch GmbH
- Spark plug with small spark gap and flat ignition element surfaces25 Nov 2025US 12,483,007 B2Robert Bosch GmbH
- Spark plug14 Oct 2025US 12,444,909 B2Robert Bosch GmbH
- Method for producing a spark plug, and spark plug8 Apr 2025US 12,272,930 B2Robert Bosch GmbH
- Spark plug with ground electrode inserted into the housing wall and with improved heat balance16 Jul 2026US 2026/0204877 A1
- Traveling spark igniter5 Mar 2026US 2026/0066621 A1Champion Aerospace Inc.
- Spark plug with a sealing earth electrode30 Jan 2025US 2025/0038488 A1Robert Bosch GmbH
- Spark plug19 Dec 2024US 2024/0421565 A1Robert Bosch GmbH
- Spark plug with small spark gap and flat ignition element surfaces12 Dec 2024US 2024/0413616 A1Robert Bosch GmbH
Most cited
By later US patents
- Optimized high power high energy ignition system88US 5,456,241 ACombustion Electromagnetics, Inc. · 1995
- Spark plug with measuring means78US 4,489,596 ARobert Bosch GmbH · 1984
- Spark plug69US 3,958,144 A1976
- Engine with flow coupled spark discharge64US 5,517,961 ACombustion Electromagnetics, Inc. · 1996
- Spark plug with specific gap between insulator and electrodes64US 6,229,253 B1Ngk Spark Plug Co., Ltd. · 2001