H05F 3/04
Carrying-off electrostatic charges: by means of spark gaps or other discharge devices
Official title: by means of spark gaps or other discharge devices (devices providing for corona discharge per se H01T19/00)
H05F3/04 (Carrying-off electrostatic charges: by means of spark gaps or other discharge devices) appears on 333 US grants and 241 published applications in this corpus.
Search patents in H05F- Granted patents
- 333
- Published applications
- 241
- Assignees
- 206
- Inventors
- 648
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 9 | 0 |
| 1978 | 8 | 0 |
| 1979 | 0 | 0 |
| 1980 | 7 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 8 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 12 | 0 |
| 1996 | 7 | 0 |
| 1997 | 9 | 0 |
| 1998 | 7 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 1 |
| 2002 | 2 | 2 |
| 2003 | 3 | 3 |
| 2004 | 5 | 11 |
| 2005 | 3 | 3 |
| 2006 | 5 | 1 |
| 2007 | 3 | 4 |
| 2008 | 2 | 4 |
| 2009 | 2 | 2 |
| 2010 | 2 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 5 |
| 2013 | 3 | 5 |
| 2014 | 4 | 12 |
| 2015 | 5 | 14 |
| 2016 | 11 | 19 |
| 2017 | 17 | 18 |
| 2018 | 11 | 21 |
| 2019 | 17 | 15 |
| 2020 | 15 | 22 |
| 2021 | 20 | 20 |
| 2022 | 19 | 16 |
| 2023 | 13 | 7 |
| 2024 | 10 | 16 |
| 2025 | 11 | 11 |
| 2026 | 6 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Electro-static discharge protection structure and electronic device3 Feb 2026US 12,543,300 B2Honor Device Co., Ltd.
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- Ion balance sensor and static elimination system24 Sep 2026US 2026/0292964 A1Keyence Corporation
- Device for discharging static electricity and method thereof11 Jun 2026US 2026/0164527 A1Mesoscope Technology Co., Ltd.
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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
- Apparatus and method for neutralizing static electric charges in sensitive manufacturing areas119US 4,477,263 A1984
- Ionizer96US 4,811,159 AAssociated Mills, Inc. · 1989
- Device and method for charge removal from dielectric surfaces61US 6,934,142 B2Robert Bosch GmbH · 2005
- Device for generating ions in gas streams57US 4,878,149 ASorbios Verfahrenstechnische Gerate und GmbH · 1989