H01T 21/06
Adjustment of spark gaps
Official title: Adjustment of spark gaps (sparking-plugs having movable electrodes for adjusting the gap H01T13/26)
H01T21/06 (Adjustment of spark gaps) appears on 56 US grants and 50 published applications in this corpus.
Search patents in H01T- Granted patents
- 56
- Published applications
- 50
- Assignees
- 22
- Inventors
- 91
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 1 | 2 |
| 2005 | 1 | 0 |
| 2006 | 2 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 3 |
| 2010 | 0 | 3 |
| 2011 | 1 | 3 |
| 2012 | 2 | 6 |
| 2013 | 4 | 4 |
| 2014 | 6 | 6 |
| 2015 | 6 | 4 |
| 2016 | 5 | 1 |
| 2017 | 1 | 1 |
| 2018 | 3 | 1 |
| 2019 | 3 | 3 |
| 2020 | 1 | 2 |
| 2021 | 2 | 2 |
| 2022 | 1 | 2 |
| 2023 | 4 | 1 |
| 2024 | 1 | 4 |
| 2025 | 3 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Spark plug14 Oct 2025US 12,444,909 B2Robert Bosch GmbH
- Prechamber spark plug having accurately adjustable electrode gap, and associated method15 Apr 2025US 12,278,465 B2Robert Bosch GmbH
- Method for producing a spark plug, and spark plug8 Apr 2025US 12,272,930 B2Robert Bosch GmbH
- Spark plug for boosted engine26 Mar 2024US 11,942,764 B1Ford Global Technologies, LLC
- Spark plug gapping tool12 Sep 2023US 11,757,263 B2GP Productions LLC
- Spark plug19 Dec 2024US 2024/0421565 A1Robert Bosch GmbH
- Method for producing a spark plug, and spark plug21 Nov 2024US 2024/0388068 A1Robert Bosch GmbH
- Prechamber spark plug having an accurately adjustable electrode gap, and associated method23 May 2024US 2024/0170928 A1Robert Bosch GmbH
- Spark plug for boosted engine18 Apr 2024US 2024/0128726 A1Ford Global Technologies, LLC
- Spark plug gapping tool18 May 2023US 2023/0155355 A1GP Productions LLC
Most cited
By later US patents
- Method and apparatus for detecting and correcting the positions of electrodes, in particular in shock wave generator apparatus using a feeler finger, e.g. the rod of an actuator, movable to the focus21US 4,868,791 A1989
- Method and apparatus for making spark plug19US 6,790,113 B1Ngk Spark Plug Co., Ltd. · 2004
- Adjustment method for spark plug and apparatus therefor11US 5,741,963 ANippondenso Co., Ltd. · 1998
- Pre-chamber igniter having adjustable electrode10US 7,513,234 B1Caterpillar Inc. · 2009
- Spark plug gauge with gap adjuster8US 5,471,759 AA&E Manufacturing Company · 1995