B63H 25/28
Of fluid type
Official title: of fluid type
B63H25/28 (Of fluid type) appears on 75 US grants and 47 published applications in this corpus.
Search patents in B63H- Granted patents
- 75
- Published applications
- 47
- Assignees
- 45
- Inventors
- 132
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 0 |
| 2003 | 3 | 5 |
| 2004 | 3 | 4 |
| 2005 | 3 | 1 |
| 2006 | 2 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 1 |
| 2009 | 1 | 1 |
| 2010 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 3 |
| 2013 | 2 | 0 |
| 2014 | 2 | 3 |
| 2015 | 1 | 5 |
| 2016 | 4 | 2 |
| 2017 | 4 | 3 |
| 2018 | 3 | 2 |
| 2019 | 4 | 4 |
| 2020 | 3 | 5 |
| 2021 | 3 | 3 |
| 2022 | 1 | 1 |
| 2023 | 0 | 1 |
| 2024 | 1 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Steering system with twin actuators and tie bar10 Feb 2026US 12,545,388 B2Dometic Marine Canada Inc.
- Collision-avoidance maneuvering method in congested water and collision-avoidance maneuvering system for single-propeller twin-rudder ship27 Feb 2024US 11,915,595 B2Japan Hamworthy & Co., Ltd.
- Electrically assisted hydraulic steering system29 Nov 2022US 11,511,841 B2Steering Solutions IP Holding Corporation
- Hydraulic helm pump with integrated electric pump10 Aug 2021US 11,084,516 B2
- Steering mechanism for a boat having a planing hull25 May 2021US 11,014,643 B2MasterCraft Boat Company, LLC
- Improvements in or relating to an outboard propulsion system19 Sep 2024US 2024/0308635 A1Caudwell Marine Limited
- Steering system having steering angle correction function for single-propeller twin-rudder ship11 Apr 2024US 2024/0116619 A1Japan Hamworthy & Co., Ltd.
- Steering system with twin actuators and tie bar1 Jun 2023US 2023/0166823 A1Marine Canada Acquisition Inc.
- Steering device and ship28 Jul 2022US 2022/0234710 A1Hitachi Astemo, Ltd.
- Electrically assisted hydraulic steering system16 Sep 2021US 2021/0284314 A1Steering Solutions IP Holding Corporation
Most cited
By later US patents
- Integrated hydraulic steering system for a marine propulsion unit64US 6,402,577 B1Brunswick Corporation · 2002
- Rudder for watercraft46US 4,434,738 AJastram-Werke GmbH KG · 1984
- Outboard motor steering system40US 6,843,195 B2Honda Motor Co., Ltd. · 2005
- Actuator for a marine steering system24US 7,699,674 B1Brunswick Corporation · 2010
- Multi-stage flow control21US 6,585,004 B1Delaware Capital Formation, Inc. · 2003