F16K 15/00
Check valves
Official title: Check valves (valves specially adapted for inflatable balls A63B41/00)
F16K15/00 (Check valves) appears on 6,707 US grants and 5,569 published applications in this corpus.
Search patents in F16K- Granted patents
- 6,707
- Published applications
- 5,569
- Assignees
- 3,231
- Inventors
- 11,456
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 87 | 0 |
| 1977 | 77 | 0 |
| 1978 | 76 | 0 |
| 1979 | 49 | 0 |
| 1980 | 83 | 0 |
| 1981 | 89 | 0 |
| 1982 | 65 | 0 |
| 1983 | 58 | 0 |
| 1984 | 74 | 0 |
| 1985 | 97 | 0 |
| 1986 | 82 | 0 |
| 1987 | 105 | 0 |
| 1988 | 79 | 0 |
| 1989 | 101 | 0 |
| 1990 | 102 | 0 |
| 1991 | 91 | 0 |
| 1992 | 104 | 0 |
| 1993 | 105 | 0 |
| 1994 | 89 | 0 |
| 1995 | 69 | 0 |
| 1996 | 67 | 0 |
| 1997 | 70 | 0 |
| 1998 | 92 | 0 |
| 1999 | 93 | 0 |
| 2000 | 129 | 0 |
| 2001 | 118 | 41 |
| 2002 | 107 | 113 |
| 2003 | 127 | 189 |
| 2004 | 126 | 167 |
| 2005 | 106 | 174 |
| 2006 | 114 | 186 |
| 2007 | 105 | 146 |
| 2008 | 91 | 153 |
| 2009 | 78 | 144 |
| 2010 | 86 | 150 |
| 2011 | 90 | 139 |
| 2012 | 124 | 151 |
| 2013 | 128 | 195 |
| 2014 | 155 | 219 |
| 2015 | 171 | 291 |
| 2016 | 201 | 287 |
| 2017 | 248 | 403 |
| 2018 | 274 | 344 |
| 2019 | 375 | 357 |
| 2020 | 308 | 314 |
| 2021 | 282 | 280 |
| 2022 | 282 | 275 |
| 2023 | 254 | 268 |
| 2024 | 260 | 223 |
| 2025 | 231 | 208 |
| 2026 | 133 | 152 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Multi-fit encapsulated oscillation dampener for automotive automatic transmissions6 Oct 2026US 12,753,833 B2Superior Transmission Parts, Inc.
- Valve6 Oct 2026US 12,753,841 B2Neoperl GmbH
- Braided flexible pipe assembly6 Oct 2026US 12,753,863 B2Taizhou Kloe Dafeng Plumbing Co., Ltd.
- Valve connector6 Oct 2026US 12,753,864 B2Co-Luck Enterprise Co., Ltd.
- Connector, connector assembly, liquid cooled plate, and liquid cooled server6 Oct 2026US 12,753,979 B2Bitmain Technologies Inc.
- Atomizer tip having a one-way valve1 Oct 2026US 2026/0295616 A1Advanced Medical Engineering, LLC
- High pressure valve1 Oct 2026US 2026/0298346 A1Arianegroup SAS
- Through-Hardened Valve Seat for Hydraulic Fracturing1 Oct 2026US 2026/0298349 A1Apex Industrial LLC
- Shut-off valve, in particular for shutting off gas.1 Oct 2026US 2026/0298358 A1Cimberio Holding S.R.L.
- Check valve1 Oct 2026US 2026/0298359 A1Proserv Gilmore Valve LLC
Most cited
By later US patents
- Valued device for controlling vacuum in surgery1,387US 4,184,510 AFibra-Sonics, Inc. · 1980
- Unitized three leaflet heart valve1,255US 4,222,126 AThe United States of America as represented by the Secretary of the Department of Health, Education and Welfare · 1980
- Dynamic annulus heart valve and reconstruction ring1,033US 4,339,831 AMedtronic, Inc. · 1982
- Method of making unitized three leaflet heart valve1,028US 4,265,694 AThe United States of America as represented by the Department of Health, Education and Welfare · 1981
- Apparatus and method for manipulating and anchoring tissue822US 5,417,691 A1995