F23N 3/06
Regulating air supply or draught: by conjoint operation of two or more
Official title: by conjoint operation of two or more valves or dampers (by power-assisted systems F23N3/08)
F23N3/06 (Regulating air supply or draught: by conjoint operation of two or more) appears on 28 US grants and 26 published applications in this corpus.
Search patents in F23N- Granted patents
- 28
- Published applications
- 26
- Assignees
- 23
- Inventors
- 68
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 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 | 1 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 2 |
| 2013 | 2 | 1 |
| 2014 | 2 | 2 |
| 2015 | 0 | 2 |
| 2016 | 0 | 2 |
| 2017 | 4 | 0 |
| 2018 | 2 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 3 |
| 2021 | 1 | 2 |
| 2022 | 3 | 2 |
| 2023 | 2 | 1 |
| 2024 | 2 | 1 |
| 2025 | 2 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Stove, control system, and method for controlling the same9 Dec 2025US 12,492,817 B2A.J. Wells & Sons Limited
- Aircraft operation4 Mar 2025US 12,241,422 B2ROLLS-ROYCE plc
- Flame module for a spectrometer9 Apr 2024US 11,953,203 B2Thermo Fisher Scientific (Bremen) GmbH
- Aircraft operation2 Jan 2024US 11,859,565 B2ROLLS-ROYCE plc
- Systems and methods of configuring a heating system26 Dec 2023US 11,852,340 B2Rheem Manufacturing Company
- Plant and method for operating plant27 Aug 2026US 2026/0251301 A1Mitsubishi Heavy Industries, Ltd.
- Manual air control device for gas burner6 Aug 2026US 2026/0227065 A1SNT Co., Ltd.
- Aircraft operation11 Apr 2024US 2024/0117771 A1ROLLS-ROYCE plc
- Aircraft operation22 Jun 2023US 2023/0193837 A1ROLLS-ROYCE plc
- Stove, control system, and method for controlling the same8 Dec 2022US 2022/0390105 A1A.J. Wells & Sons Limited
Most cited
By later US patents
- Water heater17US 8,267,051 B2Rinnai Corporation · 2012
- System for increasing heating efficiency13US 4,245,779 A1981
- System for controlling a bark-fired boiler11US 4,621,583 AMeasurex Corporation · 1986
- Control system for reducing NOx emissions from a multiple-intertube pulverized-coal burner using true delivery pipe fuel flow measurement9US 6,659,026 B1AEP EmTech, LLC · 2003
- Burning apparatus for a solid wood-fueled process heating system8US 8,627,775 B12014