H01F 38/12
Ignition
Official title: Ignition, e.g. for IC engines
H01F38/12 (Ignition) appears on 605 US grants and 461 published applications in this corpus.
Search patents in H01F- Granted patents
- 605
- Published applications
- 461
- Assignees
- 164
- Inventors
- 723
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 10 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 9 | 0 |
| 1991 | 15 | 0 |
| 1992 | 11 | 0 |
| 1993 | 5 | 0 |
| 1994 | 8 | 0 |
| 1995 | 16 | 0 |
| 1996 | 12 | 0 |
| 1997 | 12 | 0 |
| 1998 | 17 | 0 |
| 1999 | 12 | 0 |
| 2000 | 14 | 0 |
| 2001 | 27 | 5 |
| 2002 | 17 | 18 |
| 2003 | 19 | 30 |
| 2004 | 17 | 25 |
| 2005 | 24 | 32 |
| 2006 | 27 | 23 |
| 2007 | 28 | 28 |
| 2008 | 14 | 23 |
| 2009 | 8 | 19 |
| 2010 | 21 | 17 |
| 2011 | 17 | 13 |
| 2012 | 7 | 11 |
| 2013 | 7 | 12 |
| 2014 | 7 | 16 |
| 2015 | 14 | 11 |
| 2016 | 10 | 14 |
| 2017 | 12 | 21 |
| 2018 | 19 | 35 |
| 2019 | 29 | 22 |
| 2020 | 18 | 21 |
| 2021 | 16 | 28 |
| 2022 | 28 | 10 |
| 2023 | 19 | 10 |
| 2024 | 9 | 5 |
| 2025 | 4 | 9 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Multiconfiguration ignition coil and coil cap adapter12 May 2026US 12,626,860 B1
- Ignition coil assembly with internal diagnostic features3 Mar 2026US 12,567,536 B2Federal-Mogul Ignition Company
- Adaptive spark energy control10 Feb 2026US 12,546,279 B2Altronic, Inc.
- Ignition device16 Sep 2025US 12,416,281 B2Diamond&Zebra Electric Mfg. Co., Ltd.
- Method and apparatus to control an ignition system16 Sep 2025US 12,416,282 B2BorgWarner Luxembourg Automotive Systems SA
- Ignition coil28 May 2026US 2026/0148891 A1Diamond&Zebra Electric Mfg. Co., Ltd.
- Ignition coil12 Mar 2026US 2026/0071603 A1Denso Corporation
- Ignition coil and ignition device26 Feb 2026US 2026/0058054 A1Diamond&Zebra Electric Mfg. Co., Ltd.
- Ignition coil and ignition device20 Nov 2025US 2025/0354533 A1Diamond&Zebra Electric Mfg. Co., Ltd.
- Ignition coil assembly with internal diagnostic features30 Oct 2025US 2025/0336600 A1Federal-Mogul Ignition Company
Most cited
By later US patents
- Contactless energy transfer apparatus265US 6,331,744 B1Light Sciences Corporation · 2001
- Ignition system power converter and controller203US 5,558,071 ACombustion Electromagnetics, Inc. · 1996
- Contactless energy transfer apparatus105US 6,657,351 B2Light Sciences Corporation · 2003
- Use of moving element to produce heat100US 6,281,611 B1Light Sciences Corporation · 2001
- High efficiency voltage doubling ignition coil for CD system producing pulsed plasma type ignition92US 4,677,960 ACombustion Electromagnetics, Inc. · 1987