F23N 2227/18
Applying test signals
Official title: Applying test signals, e.g. periodic
F23N2227/18 (Applying test signals) appears on 13 US grants and 8 published applications in this corpus.
Search patents in F23N- Granted patents
- 13
- Published applications
- 8
- Assignees
- 11
- Inventors
- 32
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 2 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for operating a gas burner and gas burner for performing the method28 Apr 2026US 12,613,033 B2Viessmann Climate Solutions SE
- Gas cooking appliance3 May 2022US 11,320,150 B2Copreci, S. Coop.
- System for a valve setup10 Dec 2019US 10,502,340 B2Honeywell International Inc.
- Valve operation and diagnosis14 Aug 2018US 10,048,160 B2Siemens Aktiengesellschaft
- Method and measurement device for determining a condition of an electric igniter of a gas turbine burner and an ignition device for a gas turbine burner22 Oct 2013US 8,564,276 B2Siemens Aktiengesellschaft
- Test lamp for multi-spectrum mid-ir flame detectors5 Oct 2023US 2023/0316887 A1Carrier Corporation
- Method for operating a gas burner and gas burner for performing the method11 May 2023US 2023/0144467 A1Viessmann Climate Solutions SE
- Gas cooking appliance22 Oct 2020US 2020/0333013 A1Copreci, S. Coop.
- System for a valve setup23 Feb 2017US 2017/0051844 A1Honeywell International Inc.
- Valve Operation And Diagnosis10 Mar 2016US 2016/0069772 A1Siemens Aktiengesellschaft
Most cited
By later US patents
- Integrated furnace control having ignition and pressure switch diagnostics129US 4,842,510 AHamilton Standard Controls, Inc. · 1989
- Self-diagnostic flame rectification sensing circuit and method therefor123US 5,506,569 ATexas Instruments Incorporated · 1996
- Integrated furnace control having ignition switch diagnostics119US 4,955,806 AHamilton Standard Controls, Inc. · 1990
- IR flame amplifier40US 4,904,986 AHoneywell Inc. · 1990
- Burner ignition and control system17US 7,568,909 B2Platinum Energy Services Corp. · 2009