H01T 19/04
Devices providing for corona discharge: having pointed electrodes
Official title: having pointed electrodes
H01T19/04 (Devices providing for corona discharge: having pointed electrodes) appears on 287 US grants and 289 published applications in this corpus.
Search patents in H01T- Granted patents
- 287
- Published applications
- 289
- Assignees
- 185
- Inventors
- 670
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 2 | 3 |
| 2004 | 1 | 0 |
| 2005 | 0 | 2 |
| 2006 | 0 | 5 |
| 2007 | 2 | 13 |
| 2008 | 3 | 0 |
| 2009 | 7 | 7 |
| 2010 | 0 | 2 |
| 2011 | 2 | 2 |
| 2012 | 1 | 3 |
| 2013 | 5 | 9 |
| 2014 | 8 | 15 |
| 2015 | 6 | 20 |
| 2016 | 12 | 24 |
| 2017 | 19 | 13 |
| 2018 | 19 | 22 |
| 2019 | 15 | 20 |
| 2020 | 13 | 16 |
| 2021 | 20 | 22 |
| 2022 | 14 | 20 |
| 2023 | 21 | 24 |
| 2024 | 20 | 22 |
| 2025 | 16 | 13 |
| 2026 | 11 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Static eliminator and static elimination system18 Aug 2026US 12,710,745 B2Keyence Corporation
- Automatic emitter point cleaners with a detection surface cleaner11 Aug 2026US 12,703,011 B2Illinois Tool Works Inc.
- Device for ionization of a fluid11 Aug 2026US 12,706,268 B2Brairtech Sweden AB
- Ion emitter system14 Jul 2026US 12,683,362 B2Hamilton Sundstrand Corporation
- Fan assembly with self-cleaning device for generating ions2 Jun 2026US 12,646,906 B2Global Plasma Solutions, Inc.
- Apparatus and method for monitoring contaminations on discharge electrodes13 Aug 2026US 2026/0235657 A1Illinois Tool Works Inc.
- Electrohydrodynamic Heat Sink6 Aug 2026US 2026/0231373 A1Cedrion Consultoria Tecnica e Ingeniera S.L.
- Electrostatic atomizer23 Jul 2026US 2026/0208214 A1Panasonic Intellectual Property Management Co., Ltd.
- Air purifier and air-conditioning apparatus16 Jul 2026US 2026/0202070 A1Mitsubishi Electric Corporation
- Corona charger and methods of use and manufacture of the same16 Jul 2026US 2026/0204878 A1University of Cincinnati
Most cited
By later US patents
- Method and apparatus for the electrostatic charging of a web or film195US 5,401,446 AThe University of Tennessee Research Corporation · 1995
- Corona discharge apparatus157US 5,317,155 AThe Electrogesic Corporation · 1994
- Apparatus and method for destructive removal of particles contained in flowing fluid77US 4,376,637 ACalifornia Institute of Technology · 1983
- Arrangement for generating an electric corona discharge in air60US 4,976,752 AAstra-Vent AB · 1990
- Electrostatically augmented cyclone apparatus44US 4,352,681 AGeneral Electric Company · 1982