H01T 15/00
Circuits specially adapted for spark gaps
Official title: Circuits specially adapted for spark gaps, e.g. ignition circuits (ignition circuits for internal-combustion engines F02P; electric spark ignition for combustion apparatus F23Q; protection circuits using spark gaps H02H9/06)
H01T15/00 (Circuits specially adapted for spark gaps) appears on 140 US grants and 144 published applications in this corpus.
Search patents in H01T- Granted patents
- 140
- Published applications
- 144
- Assignees
- 85
- Inventors
- 291
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 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 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 2 |
| 2014 | 1 | 10 |
| 2015 | 4 | 19 |
| 2016 | 13 | 19 |
| 2017 | 27 | 20 |
| 2018 | 15 | 18 |
| 2019 | 17 | 12 |
| 2020 | 7 | 11 |
| 2021 | 13 | 6 |
| 2022 | 6 | 9 |
| 2023 | 3 | 3 |
| 2024 | 12 | 8 |
| 2025 | 7 | 4 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Surge arrester for DC mains and method of operating such a surge arrester2 Jun 2026US 12,646,931 B2Dehn SE
- Ignition coil assembly with internal diagnostic features3 Mar 2026US 12,567,536 B2Federal-Mogul Ignition Company
- Marx generator with fluid cooling and gas space for spark gaps2 Dec 2025US 12,489,277 B2Diehl Defence GmbH & Co. KG
- Igniter circuit having an adjustable over dwell time18 Nov 2025US 12,476,475 B2Semiconductor Components Industries, LLC
- Magnetic confinement of arc discharge migration in spark OES systems21 Oct 2025US 12,449,367 B2Thermo Electron Scientific Instruments LLC
- Ignition coil12 Mar 2026US 2026/0071603 A1Denso Corporation
- Surge protective devices11 Dec 2025US 2025/0379441 A1Ripd IP Development Ltd
- Ignition coil assembly with internal diagnostic features30 Oct 2025US 2025/0336600 A1Federal-Mogul Ignition Company
- Driver circuit23 Oct 2025US 2025/0330154 A1Fuji Electric Co., Ltd.
- Ignition coil system16 Jan 2025US 2025/0022652 A1Hyundai Motor Company
Most cited
By later US patents
- Emp generator29US 4,845,378 ABBC Brown, Boveri & Company, Limited · 1989
- Arrangement for forced triggering a spark gap15US 5,233,498 ANokia Capacitors Ltd. · 1993
- Ignition device for oil burners11US 4,247,880 AYamatake-Honeywell Co., Ltd. · 1981
- Control system for alloy tester10US 4,111,556 AKlockner-Werke AG · 1978
- High-voltage spark source10US 4,296,358 AFisher Scientific Company · 1981