F15B 2211/30515
Load holding valves
F15B2211/30515 (Load holding valves) appears on 259 US grants and 239 published applications in this corpus.
Search patents in F15B- Granted patents
- 259
- Published applications
- 239
- Assignees
- 148
- Inventors
- 517
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 8 | 2 |
| 2002 | 7 | 5 |
| 2003 | 4 | 5 |
| 2004 | 4 | 5 |
| 2005 | 6 | 4 |
| 2006 | 1 | 1 |
| 2007 | 5 | 3 |
| 2008 | 1 | 8 |
| 2009 | 2 | 7 |
| 2010 | 3 | 4 |
| 2011 | 7 | 6 |
| 2012 | 4 | 4 |
| 2013 | 3 | 10 |
| 2014 | 4 | 11 |
| 2015 | 8 | 11 |
| 2016 | 11 | 15 |
| 2017 | 14 | 9 |
| 2018 | 9 | 15 |
| 2019 | 18 | 11 |
| 2020 | 11 | 19 |
| 2021 | 20 | 19 |
| 2022 | 9 | 13 |
| 2023 | 13 | 15 |
| 2024 | 16 | 13 |
| 2025 | 16 | 18 |
| 2026 | 10 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydraulic machine swing system with anti-drift9 Jun 2026US 12,650,003 B2Caterpillar Inc.
- Apparatus for control of multiple fluid powered actuators26 May 2026US 12,638,028 B2Universal City Studios LLC
- Hydraulic drive system having a 2×2Q pump unit19 May 2026US 12,631,200 B2HMS-HYBRID MOTION SOLUTIONS GmbH
- Hydraulic control system and method with electro-proportional pressure valve and integral check5 May 2026US 12,618,424 B2HydraForce, Inc.
- Hydraulic system5 May 2026US 12,618,467 B2Kawasaki Jukogyo Kabushiki Kaisha
- Mobile machine with improved electric powered actuator system6 Aug 2026US 2026/0226710 A1Moog Inc.
- Submersible Hydraulic Power Units with Interchangeable Manifolds11 Jun 2026US 2026/0160275 A1
- Work machine5 Mar 2026US 2026/0062885 A1Hitachi Construction Machinery Co., Ltd.
- Hydraulic machine swing system with anti-drift29 Jan 2026US 2026/0028797 A1Caterpillar Inc.
- Valve Assembly for Double-Acting Hoisting Mechanism29 Jan 2026US 2026/0029001 A1Robert Bosch GmbH
Most cited
By later US patents
- Hydraulic circuit for automatic transmission1,004US 9,488,197 B2Hyundai Motor Company · 2016
- Fail-safe actuation system926US 9,239,064 B2Moog Inc. · 2016
- Hydraulic system providing down force on a work implement109US 6,460,623 B1Caterpillar Inc. · 2002
- Hydraulic system for supplying hydraulic fluid to a hydraulically operated device alternately at pressures of different value71US 4,142,368 AWelko Industriale S.p.A. · 1979
- Hydraulic valve module63US 4,170,214 ADouble A Products Company · 1979