H01T 19/02
Corona rings
H01T19/02 (Corona rings) appears on 40 US grants and 42 published applications in this corpus.
Search patents in H01T- Granted patents
- 40
- Published applications
- 42
- Assignees
- 39
- Inventors
- 115
- Latest grant
- 29 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 3 |
| 2012 | 1 | 1 |
| 2013 | 1 | 1 |
| 2014 | 2 | 3 |
| 2015 | 1 | 7 |
| 2016 | 3 | 6 |
| 2017 | 4 | 1 |
| 2018 | 7 | 9 |
| 2019 | 5 | 3 |
| 2020 | 3 | 1 |
| 2021 | 3 | 5 |
| 2022 | 1 | 0 |
| 2023 | 2 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wall bushing29 Jul 2025US 12,374,474 B2Hitachi Energy Ltd
- Deployment of power flow control systems7 Nov 2023US 11,807,149 B2Smart Wires Inc.
- Corona ignition device with improved electrical performance17 Jan 2023US 11,557,882 B2Tenneco Inc.
- Ion generating device for organic matter decomposition, and organic matter decomposition device15 Mar 2022US 11,273,474 B2Glencal Technology Co., Ltd.
- Corona ignition device with improved electrical performance27 Jul 2021US 11,075,504 B2Tenneco Inc.
- System and method for dispensing ground coffee19 Feb 2026US 2026/0047722 A1Breville Pty Limited
- Wall bushing21 Sep 2023US 2023/0298784 A1Hitachi Energy Switzerland AG
- Corona ignition device with improved electrical performance18 Nov 2021US 2021/0359494 A1Tenneco Inc.
- Insulator having an end fitting and a connecting device as well as arrangement for dissipating overvoltage10 Jun 2021US 2021/0174991 A1Siemens Energy Global GmbH & Co. KG
- Deployment of Power Flow Control Systems4 Mar 2021US 2021/0066917 A1Smart Wires Inc.
Most cited
By later US patents
- Corona control ring having elongated water discharge holes12US 5,705,775 ANGK Insulators, Ltd. · 1998
- Apparatus for preventing coronal discharge9US 5,552,566 AReliable Bethea Power Products, Inc. · 1996
- Ion generation device with brush-like discharge electrodes8US 10,910,186 B2Sharp Kabushiki Kaisha · 2021
- Method and system for igniting a fuel-air-mixture of a combustion chamber, in particular in a combustion engine by creating a corona discharge5US 8,800,539 B2BorgWarner BERU Systems GmbH · 2014
- Method for reducing corona in dynamoelectric machines4US 4,112,041 ACanadian General Electric Company Limited · 1978