F25B 2313/02741
Using one four-way valve
Official title: using one four-way valve
F25B2313/02741 (Using one four-way valve) appears on 575 US grants and 744 published applications in this corpus.
Search patents in F25B- Granted patents
- 575
- Published applications
- 744
- Assignees
- 164
- Inventors
- 1,136
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 1 |
| 2002 | 2 | 3 |
| 2003 | 3 | 1 |
| 2004 | 1 | 3 |
| 2005 | 2 | 2 |
| 2006 | 3 | 11 |
| 2007 | 10 | 12 |
| 2008 | 1 | 30 |
| 2009 | 5 | 43 |
| 2010 | 12 | 54 |
| 2011 | 22 | 67 |
| 2012 | 26 | 58 |
| 2013 | 23 | 61 |
| 2014 | 25 | 49 |
| 2015 | 40 | 63 |
| 2016 | 55 | 39 |
| 2017 | 57 | 27 |
| 2018 | 51 | 27 |
| 2019 | 39 | 25 |
| 2020 | 28 | 39 |
| 2021 | 24 | 23 |
| 2022 | 28 | 29 |
| 2023 | 20 | 25 |
| 2024 | 17 | 22 |
| 2025 | 15 | 19 |
| 2026 | 11 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dishwasher including heat pump apparatus28 Jul 2026US 12,690,746 B2LG Electronics Inc.
- Refrigerant flow path module and heat source unit28 Jul 2026US 12,693,054 B2Daikin Industries, Ltd.
- Four-way valve and air conditioning system provided with same7 Jul 2026US 12,674,515 B2Zhejiang Dunan Artificial Environment Co., Ltd.
- Rotary compressor and refrigeration cycle device2 Jun 2026US 12,644,631 B2Carrier Japan Corporation
- Vehicle temperature management system26 May 2026US 12,636,937 B2Shenzhen Yinwang Intelligent Technologies Co., Ltd.
- Multi-way switching valve device8 Oct 2026US 2026/0309242 A1Mikuni Corporation
- Heat pump and method for operating a heat pump23 Jul 2026US 2026/0210605 A1Viessmann Holding International GmbH
- Refrigeration cycle apparatus9 Jul 2026US 2026/0194272 A1Daikin Industries, Ltd.
- Indoor unit and air conditioner25 Jun 2026US 2026/0177280 A1Mitsubishi Electric Corporation
- Heat pump, operation method of heat pump, and server4 Jun 2026US 2026/0153268 A1LG Electronics Inc.
Most cited
By later US patents
- Ethanol production by Escherichia coli strains co-expressing Zymomonas PDC and ADH genes126US 5,000,000 AUniversity of Florida · 1991
- Air-conditioning apparatus81US 9,322,562 B2Mitsubishi Electric Corporation · 2016
- Automotive air conditioner having condenser and evaporator provided within air duct69US 5,299,431 ANippondenso Co., Ltd. · 1994
- Integrated system for heating, cooling and heat recovery ventilation61US 6,347,527 B12002
- Combined heating and air conditioning system for vehicles56US 8,517,087 B2Bergstrom, Inc. · 2013