F15B 2201/41
Liquid ports
F15B2201/41 (Liquid ports) appears on 395 US grants and 191 published applications in this corpus.
Search patents in F15B- Granted patents
- 395
- Published applications
- 191
- Assignees
- 193
- Inventors
- 568
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 11 | 0 |
| 1978 | 12 | 0 |
| 1979 | 10 | 0 |
| 1980 | 12 | 0 |
| 1981 | 15 | 0 |
| 1982 | 15 | 0 |
| 1983 | 6 | 0 |
| 1984 | 13 | 0 |
| 1985 | 8 | 0 |
| 1986 | 12 | 0 |
| 1987 | 13 | 0 |
| 1988 | 12 | 0 |
| 1989 | 11 | 0 |
| 1990 | 3 | 0 |
| 1991 | 11 | 0 |
| 1992 | 7 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 12 | 1 |
| 2002 | 6 | 9 |
| 2003 | 10 | 10 |
| 2004 | 10 | 19 |
| 2005 | 13 | 9 |
| 2006 | 8 | 6 |
| 2007 | 3 | 3 |
| 2008 | 3 | 5 |
| 2009 | 2 | 5 |
| 2010 | 2 | 1 |
| 2011 | 2 | 2 |
| 2012 | 2 | 5 |
| 2013 | 3 | 6 |
| 2014 | 5 | 9 |
| 2015 | 5 | 10 |
| 2016 | 3 | 8 |
| 2017 | 11 | 8 |
| 2018 | 7 | 14 |
| 2019 | 13 | 9 |
| 2020 | 9 | 11 |
| 2021 | 14 | 4 |
| 2022 | 5 | 7 |
| 2023 | 4 | 6 |
| 2024 | 5 | 10 |
| 2025 | 8 | 12 |
| 2026 | 7 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydraulic accumulator2 Jun 2026US 12,644,473 B2Hydac Technology GmbH
- Adaptive repressurizer26 May 2026US 12,638,026 B2Saudi Arabian Oil Company
- Hydraulic pressure control unit19 May 2026US 12,630,131 B2Robert Bosch GmbH
- Oil drain valve, energy accumulation device, hydraulic system and working machine5 May 2026US 12,618,423 B2Sany Autmobile Manufacturing Co. Ltd
- Mechanism for regulating high pressure industrial air using double layer electromagnetic valves28 Apr 2026US 12,612,928 B2Viettel Group
- Medium pressure accumulator with fast fill supply valve and brake system using same21 May 2026US 2026/0138577 A1ZF Active Safety US Inc.
- Method2 Apr 2026US 2026/0092610 A1Hydac Technology GmbH
- Bellows Accumulator2 Oct 2025US 2025/0305520 A1Hydac Technology GmbH
- Hydraulic Accumulator7 Aug 2025US 2025/0250995 A1Hydac Technology GmbH
- Drop-in signal accumulator piston kit and method for replacing an original equipment signal accumulator piston10 Jul 2025US 2025/0223977 A1Sonnax Transmission Company
Most cited
By later US patents
- Hydrostatic bladder-type storage means90US 4,367,786 ADaimler-Benz Aktiengesellschaft · 1983
- Distributed accumulator81US 4,651,781 ANorthrop Corporation · 1987
- Accumulator65US 4,997,009 ANHK Spring Co., Ltd. · 1991
- Adaptive hydropneumatic pulsation damper52US 5,797,430 AMercedes-Benz AG · 1998
- Accumulator51US 6,789,576 B2NHK Spring Co., Ltd. · 2004