Y10T 137/86839
Four port reversing valves
Y10T137/86839 (Four port reversing valves) appears on 177 US grants and 72 published applications in this corpus.
Search patents in Y10T- Granted patents
- 177
- Published applications
- 72
- Assignees
- 94
- Inventors
- 249
- Latest grant
- 5 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 7 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 6 | 0 |
| 1999 | 8 | 0 |
| 2000 | 12 | 0 |
| 2001 | 8 | 1 |
| 2002 | 1 | 1 |
| 2003 | 1 | 7 |
| 2004 | 7 | 7 |
| 2005 | 5 | 3 |
| 2006 | 7 | 10 |
| 2007 | 3 | 2 |
| 2008 | 2 | 4 |
| 2009 | 3 | 1 |
| 2010 | 4 | 4 |
| 2011 | 2 | 9 |
| 2012 | 2 | 7 |
| 2013 | 9 | 3 |
| 2014 | 7 | 5 |
| 2015 | 5 | 1 |
| 2016 | 2 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 2 |
| 2024 | 3 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Gas circulation apparatus, gas circulation method, pneumatic apparatus, and semiconductor device5 Nov 2024US 12,135,045 B2Changxin Memory Technologies, Inc.
- Flow path switching device8 Oct 2024US 12,110,972 B2Nipro Corporation
- Guide frame for four-way reversing valve1 Oct 2024US 12,104,708 B2Zhejiang Dunan Artificial Environment Co., Ltd.
- Switching valve device5 Sep 2023US 11,746,920 B2Eagle Industry Co., Ltd.
- Four-way valve for switching refrigerant channel25 May 2021US 11,015,725 B2LG Electronics Inc.
- Guide frame for four-way reversing valve20 Jul 2023US 2023/0228334 A1Zhejiang Dunan Artificial Environment Co., Ltd.
- Gas circulation apparatus, gas circulation method, pneumatic apparatus, and semiconductor device9 Feb 2023US 2023/0041577 A1Changxin Memory Technologies, Inc.
- Switching valve device18 Aug 2022US 2022/0260169 A1Eagle Industry Co., Ltd.
- Flow path switching device27 Aug 2020US 2020/0271232 A1Nipro Corporation
- Four-way valve for switching refrigerant channel22 Aug 2019US 2019/0257436 A1LG Electronics Inc.
Most cited
By later US patents
- Hermetic flow selector valve105US 6,743,193 B2Nx Stage Medical, Inc. · 2004
- Valve structure84US 5,787,928 ARansburg Corporation · 1998
- Valve construction38US 3,938,553 A1976
- Full flow multiport butterfly valve32US 4,774,977 APerformance Pool Products, Ltd. · 1988
- Four wave valve for reversible cycle refrigeration system31US 4,139,355 AEssex Group, Inc. · 1979