H01T 13/41
With interference suppressing or shielding means
Official title: with interference suppressing or shielding means
H01T13/41 (With interference suppressing or shielding means) appears on 133 US grants and 101 published applications in this corpus.
Search patents in H01T- Granted patents
- 133
- Published applications
- 101
- Assignees
- 41
- Inventors
- 189
- Latest grant
- 5 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 0 |
| 2003 | 2 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 2 | 2 |
| 2007 | 0 | 4 |
| 2008 | 3 | 3 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 3 | 4 |
| 2012 | 4 | 6 |
| 2013 | 0 | 3 |
| 2014 | 5 | 5 |
| 2015 | 8 | 8 |
| 2016 | 8 | 7 |
| 2017 | 12 | 13 |
| 2018 | 10 | 12 |
| 2019 | 12 | 8 |
| 2020 | 5 | 8 |
| 2021 | 3 | 5 |
| 2022 | 5 | 4 |
| 2023 | 2 | 3 |
| 2024 | 2 | 3 |
| 2025 | 4 | 1 |
| 2026 | 0 | 1 |
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 plug3 Jun 2025US 12,322,931 B2Niterra Co., Ltd.
- Spark igniter with magnetic field for pushing spark25 Feb 2025US 12,237,649 B2Pratt & Whitney Canada Corp.
- Spark plug resistance element and spark plug25 Feb 2025US 12,237,650 B2Robert Bosch GmbH
- Spark plug with electrode head shielding element11 Jun 2024US 12,009,640 B2EcoPower Spark, LLC
- Spark plug resistor element arrangement, method for producing same, and spark plug for an internal combustion engine27 Aug 2026US 2026/0254205 A1
- Spark plug25 Dec 2025US 2025/0392105 A1Niterra Co., Ltd.
- Spark plug with electrode head shielding element5 Dec 2024US 2024/0405520 A1EcoPower Spark, LLC
- Igniter3 Oct 2024US 2024/0332915 A1Pratt & Whitney Canada Corp.
- Spark plug connector1 Aug 2024US 2024/0258772 A1
Most cited
By later US patents
- Resistor-incorporated spark plug and manufacturing method of resistor-incorporated spark plug41US 6,160,342 ANgk Spark Plug Co., Ltd. · 2000
- Spark plug with specific measured parameters28US 6,130,498 ADenso Corporation · 2000
- Spark plug having an internal conductor configuration24US 6,380,664 B1Robert Bosch GmbH · 2002
- Spark plug23US 4,713,582 ANippondenso Co., Ltd. · 1987
- Resistor built-in spark plug21US 3,967,230 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1976