F15B 2211/41554
Being connected to a return line and a directional control valve
Official title: being connected to a return line and a directional control valve
F15B2211/41554 (Being connected to a return line and a directional control valve) appears on 124 US grants and 112 published applications in this corpus.
Search patents in F15B- Granted patents
- 124
- Published applications
- 112
- Assignees
- 76
- Inventors
- 249
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 1 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 2 | 3 |
| 2005 | 4 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 2 |
| 2011 | 2 | 9 |
| 2012 | 4 | 5 |
| 2013 | 4 | 6 |
| 2014 | 5 | 3 |
| 2015 | 2 | 8 |
| 2016 | 2 | 2 |
| 2017 | 3 | 5 |
| 2018 | 7 | 11 |
| 2019 | 10 | 8 |
| 2020 | 5 | 8 |
| 2021 | 13 | 3 |
| 2022 | 3 | 11 |
| 2023 | 5 | 6 |
| 2024 | 6 | 11 |
| 2025 | 12 | 4 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
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- Systems and methods for energy storage and recovery using compressed gas63US 7,900,444 B1SustainX, Inc. · 2011
- Fluid control system for power shovel46US 5,083,428 AKabushiki Kaisha Kobe Seiko Sho · 1992
- Apparatus and method for actuating arms36US 6,702,010 B2Computalog U.S.A., Inc. · 2004