A61M 39/24
Check- or non-return valves
A61M39/24 (Check- or non-return valves) appears on 1,734 US grants and 2,356 published applications in this corpus.
Search patents in A61M- Granted patents
- 1,734
- Published applications
- 2,356
- Assignees
- 800
- Inventors
- 3,289
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 6 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 13 | 0 |
| 1994 | 11 | 0 |
| 1995 | 10 | 0 |
| 1996 | 5 | 0 |
| 1997 | 9 | 0 |
| 1998 | 13 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 9 | 4 |
| 2002 | 12 | 25 |
| 2003 | 18 | 19 |
| 2004 | 11 | 19 |
| 2005 | 8 | 31 |
| 2006 | 8 | 36 |
| 2007 | 13 | 37 |
| 2008 | 7 | 36 |
| 2009 | 14 | 61 |
| 2010 | 17 | 49 |
| 2011 | 39 | 57 |
| 2012 | 50 | 64 |
| 2013 | 44 | 71 |
| 2014 | 58 | 88 |
| 2015 | 60 | 97 |
| 2016 | 81 | 162 |
| 2017 | 79 | 162 |
| 2018 | 107 | 137 |
| 2019 | 131 | 157 |
| 2020 | 145 | 162 |
| 2021 | 110 | 205 |
| 2022 | 127 | 146 |
| 2023 | 136 | 173 |
| 2024 | 148 | 136 |
| 2025 | 113 | 124 |
| 2026 | 65 | 98 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- A61M 2039/2433Valve comprising a resilient or deformable elementIndexing code488
- A61M 2039/242Designed to open when a predetermined pressure or flow rate has beenIndexing code387
- A61M 2039/2473Valve comprising a non-deformable, movable elementIndexing code289
- A61M 2039/2426Slit valveIndexing code257
- A61M 2039/2406Designed to quickly shut upon the presence of back-pressureIndexing code105
- A61M 2039/2493Check valve with complex designIndexing code92
- A61M 2039/2413Designed to reduce and or shut-off the flow when a certain maximumIndexing code49
Recent patents
- Inflation control valve29 Sep 2026US 12,746,139 B2Djo, LLC
- Needleless connector having check valve with concave flow surface29 Sep 2026US 12,746,383 B2CareFusion 303, Inc.
- Methods and systems for draining cerebrospinal fluid into the venous system15 Sep 2026US 12,734,344 B2Cerevasc, Inc.
- Septum to facilitate blood collection and related methods1 Sep 2026US 12,721,969 B2Becton, Dickinson and Company
- Dialysis system and apparatus with fluid flow control1 Sep 2026US 12,721,988 B2Vantive Health GmbH
- Cleaning device for private parts8 Oct 2026US 2026/0306732 A1Shenzhen Hengnengda Technology Co., Ltd.
- Catheter with inflatable expansion tube structure8 Oct 2026US 2026/0306793 A1
- Venticular Shunt System8 Oct 2026US 2026/0306807 A1Queen's University at Kingston
- Ingestible devices, assemblies, and methods for delivering a therapeutic agent8 Oct 2026US 2026/0306810 A1Rani Therapeutics, LLC
- Dripless fluid coupling devices and methods of use8 Oct 2026US 2026/0306821 A1EMD Millipore Corporation
Most cited
By later US patents
- Robotic surgical instruments with a fluid flow control system for irrigation, aspiration, and blowing2,107US 8,241,271 B2Intuitive Surgical Operations, Inc. · 2012
- Irrigation system for endoscopic surgery1,585US 6,358,224 B1Tyco Healthcare Group LP · 2002
- Vacuum assisted wound dressing1,328US 8,715,256 B2Smith & Nephew, Inc. · 2014
- Cassette for intravenous-line flow-control system453US 6,165,154 ADEKA Products Limited Partnership · 2000
- Method and system for measuring volume and controlling flow439US 5,533,389 ADEKA Products Limited Partnership · 1996