H01T 13/36
Characterised by the joint between insulation and body
Official title: characterised by the joint between insulation and body, e.g. using cement
H01T13/36 (Characterised by the joint between insulation and body) appears on 159 US grants and 162 published applications in this corpus.
Search patents in H01T- Granted patents
- 159
- Published applications
- 162
- Assignees
- 29
- Inventors
- 221
- Latest grant
- 5 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 5 |
| 2003 | 2 | 4 |
| 2004 | 4 | 1 |
| 2005 | 4 | 3 |
| 2006 | 1 | 2 |
| 2007 | 1 | 10 |
| 2008 | 2 | 5 |
| 2009 | 1 | 2 |
| 2010 | 9 | 5 |
| 2011 | 6 | 9 |
| 2012 | 5 | 8 |
| 2013 | 7 | 11 |
| 2014 | 14 | 6 |
| 2015 | 8 | 10 |
| 2016 | 6 | 8 |
| 2017 | 7 | 7 |
| 2018 | 15 | 12 |
| 2019 | 10 | 11 |
| 2020 | 14 | 12 |
| 2021 | 14 | 11 |
| 2022 | 5 | 5 |
| 2023 | 8 | 7 |
| 2024 | 5 | 5 |
| 2025 | 3 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Spark plug with electrode head shielding element5 Aug 2025US 12,381,374 B2EcoPower Spark, LLC
- Spark plug1 Jul 2025US 12,348,007 B2Caterpillar Energy Solutions GmbH
- Spark plug11 Mar 2025US 12,249,808 B2Niterra Co., Ltd.
- Spark plug with electrode head shielding element11 Jun 2024US 12,009,640 B2EcoPower Spark, LLC
- Spark plug4 Jun 2024US 12,003,078 B2Ngk Spark Plug Co., Ltd.
- Spark-plug wires for vehicle ignition system26 Mar 2026US 2026/0088591 A1Ford Global Technologies, LLC
- Spark plug1 Jan 2026US 2026/0005493 A1Niterra Co., Ltd.
- Spark plug2 Jan 2025US 2025/0007248 A1Niterra Co., Ltd.
- Spark plug with electrode head shielding element5 Dec 2024US 2024/0405520 A1EcoPower Spark, LLC
- Spark plug14 Nov 2024US 2024/0380189 A1Niterra Co., Ltd.
Most cited
By later US patents
- Spark plug and method of manufacturing the same23US 6,414,420 B1Ngk Spark Plug Co., Ltd. · 2002
- Spark plug having an oil film on an intermediate portion of the insulator or intermediate portion of the metallic shell16US 6,858,975 B1Ngk Spark Plug Co., Ltd. · 2005
- Spark plug15US 6,373,173 B1Ngk Spark Plug Co., Ltd. · 2002
- Spark plug seal11US 4,193,012 AChampion Spark Plug Company · 1980
- Metallic insulator coating for high capacity spark plug11US 8,278,808 B2Federal-Mogul Worldwide, Inc. · 2012