H01T 19/00
Devices providing for corona discharge
Official title: Devices providing for corona discharge (for charging electrographic elements G03G15/02)
H01T19/00 (Devices providing for corona discharge) appears on 801 US grants and 523 published applications in this corpus.
Search patents in H01T- Granted patents
- 801
- Published applications
- 523
- Assignees
- 395
- Inventors
- 1,498
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 19 | 0 |
| 1978 | 11 | 0 |
| 1979 | 13 | 0 |
| 1980 | 14 | 0 |
| 1981 | 17 | 0 |
| 1982 | 10 | 0 |
| 1983 | 11 | 0 |
| 1984 | 10 | 0 |
| 1985 | 18 | 0 |
| 1986 | 14 | 0 |
| 1987 | 21 | 0 |
| 1988 | 17 | 0 |
| 1989 | 16 | 0 |
| 1990 | 22 | 0 |
| 1991 | 17 | 0 |
| 1992 | 15 | 0 |
| 1993 | 15 | 0 |
| 1994 | 14 | 0 |
| 1995 | 14 | 0 |
| 1996 | 17 | 0 |
| 1997 | 11 | 0 |
| 1998 | 16 | 0 |
| 1999 | 13 | 0 |
| 2000 | 11 | 0 |
| 2001 | 11 | 3 |
| 2002 | 7 | 5 |
| 2003 | 9 | 8 |
| 2004 | 9 | 2 |
| 2005 | 4 | 4 |
| 2006 | 1 | 7 |
| 2007 | 4 | 19 |
| 2008 | 7 | 3 |
| 2009 | 8 | 12 |
| 2010 | 5 | 5 |
| 2011 | 4 | 11 |
| 2012 | 4 | 5 |
| 2013 | 10 | 15 |
| 2014 | 19 | 26 |
| 2015 | 8 | 45 |
| 2016 | 24 | 48 |
| 2017 | 42 | 36 |
| 2018 | 40 | 42 |
| 2019 | 33 | 36 |
| 2020 | 27 | 23 |
| 2021 | 29 | 33 |
| 2022 | 23 | 43 |
| 2023 | 31 | 31 |
| 2024 | 26 | 31 |
| 2025 | 24 | 15 |
| 2026 | 16 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air conditioning apparatus15 Sep 2026US 12,734,472 B2LG Electronics Inc.
- 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
- 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
- Corona source for producing corona discharge and fluid waste treatment with corona discharge107US 5,655,210 AHughes Aircraft Company · 1997
- Electrostatic air treatment and movement system97US 5,024,685 AAstra-Vent AB · 1991
- Electrostatic fluid accelerator83US 6,504,308 B1Kronos Air Technologies, Inc. · 2003