F24D 11/0271
Combined with conventional energy
Official title: {combined with conventional energy}
F24D11/0271 (Combined with conventional energy) appears on 10 US grants and 3 published applications in this corpus.
Search patents in F24D- Granted patents
- 10
- Published applications
- 3
- Assignees
- 8
- Inventors
- 18
- Latest grant
- 12 Dec 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 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 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Heat recovery apparatus and methods of increasing energy efficiency of hybrid heating systems using the apparatus12 Dec 2023US 11,841,147 B2Rheem Manufacturing Company
- Air conditioning system20 Aug 2019US 10,386,078 B2Daikin Industries, Ltd.
- Hybrid heat pump system15 May 2018US 9,970,665 B2Mitsubishi Electric US, Inc.
- Multistage thermostat using integral initiation change means1 Jun 1982US 4,332,352 AHoneywell Inc.
- Fuel fired supplementary heater for heat pump4 Mar 1980US 4,191,023 AElectric Power Research Institute, Inc.
- Heat recovery apparatus and methods of increasing energy efficiency of hybrid heating systems using the apparatus4 May 2023US 2023/0134566 A1Rheem Manufacturing Company
- Hybrid Heat Pump System9 Mar 2017US 2017/0067652 A1Mitsubishi Electric US, Inc.
- Air conditioning system6 Aug 2015US 2015/0219342 A1Daikin Industries, Ltd.
Most cited
By later US patents
- Multistage thermostat using integral initiation change means93US 4,332,352 AHoneywell Inc. · 1982
- Air conditioning apparatus including a heat pump73US 4,143,707 AThe Trane Company · 1979
- Control for a combination furnace and heat pump system51US 4,178,988 ACarrier Corporation · 1979
- Combination heating system including a conventional furnace, heat pump and solar energy subsystem29US 4,190,199 ALennox Industries Inc. · 1980
- Fuel fired supplementary heater for heat pump23US 4,112,705 AElectric Power Research Institute, Inc. · 1978