F23Q 23/00
Testing of ignition installations
Official title: Testing of ignition installations (peculiar to internal-combustion engines F02P17/00)
F23Q23/00 (Testing of ignition installations) appears on 29 US grants and 32 published applications in this corpus.
Search patents in F23Q- Granted patents
- 29
- Published applications
- 32
- Assignees
- 28
- Inventors
- 70
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 3 |
| 2005 | 0 | 2 |
| 2006 | 0 | 0 |
| 2007 | 1 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 1 |
| 2017 | 2 | 3 |
| 2018 | 1 | 4 |
| 2019 | 1 | 2 |
| 2020 | 4 | 1 |
| 2021 | 1 | 1 |
| 2022 | 2 | 4 |
| 2023 | 2 | 1 |
| 2024 | 3 | 1 |
| 2025 | 0 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Ignition system and method of operating a combustion engine20 Jan 2026US 12,529,341 B2General Electric Company
- Smart candle platform and system1 Oct 2024US 12,104,783 B2LuDela Technologies LLC
- Using diode rectification to determine igniter, inducer relay, and igniter relay faults13 Aug 2024US 12,060,994 B2Copeland Comfort Control LP
- Smart candle platform and system9 Jan 2024US 11,867,393 B2LuDela Technologies LLC
- Using diode rectification to determine igniter, inducer relay, and igniter relay faults10 Oct 2023US 11,781,752 B2Copeland Comfort Control LP
- Ignition system and method of operating a combustion engine11 Dec 2025US 2025/0376948 A1General Electric Company
- Smart candle platform and system24 Apr 2025US 2025/0129933 A1LuDela Technologies LLC
- Using diode rectification to determine igniter, inducer relay, and igniter relay faults8 Feb 2024US 2024/0044491 A1Copeland Comfort Control LP
- Smart candle platform and system8 Jun 2023US 2023/0175688 A1LuDela Technologies LLC
- Using diode rectification to determine igniter, inducer relay, and igniter relay faults29 Dec 2022US 2022/0412559 A1Emerson Electric Co.
Most cited
By later US patents
- Flame sensor verification61US 5,722,822 ACarrier Corporation · 1998
- Hand-held non-contacting electric field detection tool26US 5,363,045 A1994
- Fuel burner having an intermittent pilot with pre-ignition testing25US 5,035,607 AHoneywell Inc. · 1991
- Smart candle platform and system8US 9,810,426 B2LuDela, Inc. · 2017
- Safe start check circuit5US 4,226,581 AHoneywell Inc. · 1980