H01T 13/32
Characterised by features of the earthed electrode
Official title: characterised by features of the earthed electrode
H01T13/32 (Characterised by features of the earthed electrode) appears on 585 US grants and 556 published applications in this corpus.
Search patents in H01T- Granted patents
- 585
- Published applications
- 556
- Assignees
- 105
- Inventors
- 655
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 2 |
| 2002 | 6 | 6 |
| 2003 | 5 | 3 |
| 2004 | 6 | 7 |
| 2005 | 4 | 13 |
| 2006 | 7 | 14 |
| 2007 | 10 | 15 |
| 2008 | 4 | 16 |
| 2009 | 4 | 18 |
| 2010 | 18 | 25 |
| 2011 | 16 | 25 |
| 2012 | 29 | 26 |
| 2013 | 19 | 34 |
| 2014 | 43 | 33 |
| 2015 | 37 | 33 |
| 2016 | 32 | 19 |
| 2017 | 34 | 40 |
| 2018 | 40 | 36 |
| 2019 | 37 | 36 |
| 2020 | 41 | 38 |
| 2021 | 32 | 20 |
| 2022 | 19 | 25 |
| 2023 | 31 | 24 |
| 2024 | 29 | 28 |
| 2025 | 13 | 10 |
| 2026 | 5 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- Spark plug electrode having thermally resilient joint and method of manufacturing the same10 Feb 2026US 12,548,984 B2Federal-Mogul Ignition Company
- Spark plug24 Sep 2026US 2026/0291185 A1Niterra Co., Ltd.
- 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
- Electrode with elongated elevation or groove, and a spark plug comprising such an electrode as a ground electrode23 Jul 2026US 2026/0213499 A1Robert Bosch GmbH
Most cited
By later US patents
- Spark plug110US 6,495,948 B1Pyrotek Enterprises, Inc. · 2002
- Rapid heat-dissipating type spark plug for internal combustion engines67US 5,017,826 ANgk Spark Plug Co., Ltd. · 1991
- Spark plug with specific gap between insulator and electrodes64US 6,229,253 B1Ngk Spark Plug Co., Ltd. · 2001
- Spark plug and its electrode configuration57US 4,700,103 ANgk Spark Plug Co., Ltd. · 1987
- Internal combustion engine having a permanent ground electrode and replaceable center electrode element44US 5,014,656 AGeneral Motors Corporation · 1991