H01T 13/52
Sparking plugs: characterised by a discharge along a surface
Official title: characterised by a discharge along a surface
H01T13/52 (Sparking plugs: characterised by a discharge along a surface) appears on 131 US grants and 99 published applications in this corpus.
Search patents in H01T- Granted patents
- 131
- Published applications
- 99
- Assignees
- 51
- Inventors
- 246
- Latest grant
- 25 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 7 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 1 |
| 2003 | 3 | 2 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 3 |
| 2008 | 2 | 5 |
| 2009 | 0 | 4 |
| 2010 | 4 | 2 |
| 2011 | 2 | 3 |
| 2012 | 7 | 8 |
| 2013 | 4 | 6 |
| 2014 | 4 | 4 |
| 2015 | 2 | 8 |
| 2016 | 10 | 4 |
| 2017 | 6 | 7 |
| 2018 | 6 | 12 |
| 2019 | 6 | 9 |
| 2020 | 10 | 12 |
| 2021 | 9 | 1 |
| 2022 | 3 | 2 |
| 2023 | 2 | 2 |
| 2024 | 2 | 1 |
| 2025 | 1 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Spark igniter with magnetic field for pushing spark25 Feb 2025US 12,237,649 B2Pratt & Whitney Canada Corp.
- Spark plug3 Dec 2024US 12,160,089 B1Niterra Co., Ltd.
- Plasma assisted spark ignition systems and methods12 Mar 2024US 11,929,595 B2Transient Plasma Systems, Inc.
- Passive prechamber spark plug14 Nov 2023US 11,815,005 B2Bayerische Motoren Werke Aktiengesellschaft
- Traveling spark igniter1 Aug 2023US 11,715,935 B2Knite, Inc.
- Traveling spark igniter5 Mar 2026US 2026/0066621 A1Champion Aerospace Inc.
- Spark plug4 Dec 2025US 2025/0372960 A1Niterra Co., Ltd.
- Spark plug26 Jun 2025US 2025/0210944 A1Niterra Co., Ltd.
- Igniter3 Oct 2024US 2024/0332915 A1Pratt & Whitney Canada Corp.
- Ignition device12 Oct 2023US 2023/0327407 A1Mitsubishi Electric Corporation
Most cited
By later US patents
- Spark plug with measuring means78US 4,489,596 ARobert Bosch GmbH · 1984
- Spark plug with combined surface and air spark paths31US 4,795,937 ABeru Ruprecht GmbH & Co. KG · 1989
- Spark plug and an internal combustion engine igniting system using the same29US 6,095,124 ANgk Spark Plug Co., Ltd. · 2000
- Spark plug having combined surface and air gaps27US 4,963,784 ABeru Reprecht GmbH & Co. KB · 1990
- Long distance discharge gap type spark plug26US 4,092,558 ANgk Spark Plug Co., Ltd. · 1978