F23N 2233/04
With variable speed
Official title: with variable speed
F23N2233/04 (With variable speed) appears on 122 US grants and 73 published applications in this corpus.
Search patents in F23N- Granted patents
- 122
- Published applications
- 73
- Assignees
- 65
- Inventors
- 193
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 1 |
| 2003 | 1 | 3 |
| 2004 | 2 | 3 |
| 2005 | 4 | 2 |
| 2006 | 0 | 2 |
| 2007 | 2 | 1 |
| 2008 | 1 | 4 |
| 2009 | 0 | 4 |
| 2010 | 1 | 1 |
| 2011 | 2 | 4 |
| 2012 | 1 | 8 |
| 2013 | 6 | 4 |
| 2014 | 3 | 4 |
| 2015 | 1 | 4 |
| 2016 | 4 | 2 |
| 2017 | 5 | 5 |
| 2018 | 5 | 7 |
| 2019 | 5 | 0 |
| 2020 | 3 | 5 |
| 2021 | 0 | 1 |
| 2022 | 2 | 3 |
| 2023 | 4 | 3 |
| 2024 | 2 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Motor controller for draft inducer motor in a furnace and method of use3 Mar 2026US 12,565,996 B2Regal Beloit America, Inc.
- Systems and methods for checking status of a pressure transducer27 Aug 2024US 12,072,110 B2Copeland Comfort Control LP
- RPM control method of blower for gas furnace13 Feb 2024US 11,898,799 B2LG Electronics Inc.
- Electronically controlled vent damper24 Oct 2023US 11,796,187 B2Midea Group Co., Ltd.
- Systems and methods for checking status of a pressure transducer25 Apr 2023US 11,635,220 B2Emerson Electric Co.
- Catalytic burner and hydrogen boiler for water heating10 Apr 2025US 2025/0116398 A1Giacomini S.p. A.
- Dual motor controller for furnace applications29 Jun 2023US 2023/0204211 A1Carrier Corporation
- Electronic Gas/Air Burner Modulating Control15 Jun 2023US 2023/0184433 A1Wayne/Scott Fetzer Company
- Systems and methods for checking status of a pressure transducer25 May 2023US 2023/0160589 A1Emerson Electric Co.
- Motor controller for draft inducer motor in a furnace and method of use26 May 2022US 2022/0163204 A1Regal Beloit America, Inc.
Most cited
By later US patents
- Electronically commutated motor1,555US 4,169,990 AGeneral Electric Company · 1979
- Electronically commutated motor systems and control therefor813US 4,459,519 AGeneral Electric Company · 1984
- Modulating furnace with two-speed draft inducer138US 5,732,691 ARheem Manufacturing Company · 1998
- Non-recovery coke oven gas combustion system135US 5,968,320 AStelco Inc. · 1999
- Refrigeration system and control therefor123US 4,015,182 AGeneral Electric Company · 1977