F42D 1/045
Arrangements for electric ignition
Official title: Arrangements for electric ignition (dynamo-electric generators H02K)
F42D1/045 (Arrangements for electric ignition) appears on 669 US grants and 565 published applications in this corpus.
Search patents in F42D- Granted patents
- 669
- Published applications
- 565
- Assignees
- 234
- Inventors
- 927
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 6 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 8 | 0 |
| 1989 | 9 | 0 |
| 1990 | 4 | 0 |
| 1991 | 8 | 0 |
| 1992 | 9 | 0 |
| 1993 | 3 | 0 |
| 1994 | 10 | 0 |
| 1995 | 8 | 0 |
| 1996 | 13 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 11 | 2 |
| 2002 | 10 | 6 |
| 2003 | 10 | 13 |
| 2004 | 9 | 12 |
| 2005 | 12 | 27 |
| 2006 | 15 | 18 |
| 2007 | 7 | 12 |
| 2008 | 13 | 17 |
| 2009 | 13 | 12 |
| 2010 | 13 | 16 |
| 2011 | 13 | 15 |
| 2012 | 11 | 23 |
| 2013 | 14 | 23 |
| 2014 | 18 | 17 |
| 2015 | 23 | 25 |
| 2016 | 21 | 24 |
| 2017 | 29 | 23 |
| 2018 | 19 | 26 |
| 2019 | 33 | 30 |
| 2020 | 22 | 29 |
| 2021 | 26 | 50 |
| 2022 | 46 | 42 |
| 2023 | 30 | 26 |
| 2024 | 40 | 38 |
| 2025 | 48 | 25 |
| 2026 | 20 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Perforating gun and ballistic interrupter for same6 Oct 2026US 12,753,681 B2Oso Perforating, LLC
- Downhole perforating gun tube and components29 Sep 2026US 12,747,656 B1SWM International, LLC
- Avalanche triggering apparatus15 Sep 2026US 12,736,318 B2
- Electronic detonator spool and detonator comprising such a spool18 Aug 2026US 12,710,258 B2Davey Bickford
- Single-capacitor electronic detonator and system for firing such single-capacitor electronic detonators4 Aug 2026US 12,698,954 B2Davey Bickford
- Electronic detonator spool and detonator comprising such a spool1 Oct 2026US 2026/0298603 A1Davey Bickford
- Mixed blasting system6 Aug 2026US 2026/0227166 A1Detnet South Africa (Pty) Ltd
- Wireless detonator consolidation30 Jul 2026US 2026/0219017 A1
- Avalanche triggering apparatus23 Jul 2026US 2026/0210685 A1Alpine Infrastructure Inc.
- Reusable perforating gun system and method16 Jul 2026US 2026/0201780 A1G&H Diversified Manufacturing LP
Most cited
By later US patents
- Detonator actuator151US 5,090,321 AICI Australia Limited · 1992
- Detonators for use with explosive devices136US 6,752,083 B1Schlumberger Technology Corporation · 2004
- Firing system for a perforating gun including an exploding foil initiator and an outer housing for conducting wireline current and EFI current131US 5,347,929 ASchlumberger Technology Corporation · 1994
- Remote detonation of explosive charges130US 4,884,506 AElectronic Warfare Associates, Inc. · 1989
- Integrated detonator delay circuits and firing console127US 4,674,047 AThe Curators of the University of Missouri · 1987