B63H 21/165
By hydraulic fluid motor, i.e. wherein a liquid under pressure is utilised
Official title: by hydraulic fluid motor, i.e. wherein a liquid under pressure is utilised to rotate the propelling means {(transmission from power plant or unit to propeller using fluid gearing per se B63H23/26)}
B63H21/165 (By hydraulic fluid motor, i.e. wherein a liquid under pressure is utilised) appears on 16 US grants and 13 published applications in this corpus.
Search patents in B63H- Granted patents
- 16
- Published applications
- 13
- Assignees
- 8
- Inventors
- 19
- Latest grant
- 4 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 4 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 4 | 3 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Amphibious vehicle2 Jul 2024US 12,023,972 B1Bazooka-Farmstar, LLC
- Amphibious vehicle9 Jan 2024US 11,865,885 B2Bazooka-Farmstar, LLC
- Amphibious vehicle19 Mar 2026US 2026/0077624 A1Bazooka-Farmstar, LLC
- Amphibious vehicle9 Jan 2025US 2025/0010673 A1Bazooka-Farmstar, LLC
- Emissions control watercraft7 Nov 2024US 2024/0367762 A1STAX Engineering, Inc.
- Amphibious vehicle13 Jun 2024US 2024/0190193 A1Bazooka-Farmstar, LLC
- Amphibious vehicle28 Mar 2024US 2024/0100896 A1Bazooka-Farmstar, LLC
Most cited
By later US patents
- Device for rotationally driving and steering a screw-rudder of a floating vehicle17US 4,358,280 AValeo · 1982
- Hydraulic thrust producing implement14US 5,249,378 A1993
- Naval propulsion plant with hydraulic transmission4US 4,871,332 ANautical Propulsion Research Limited · 1989
- Marine propulsion system4US 5,813,887 A1998
- Parallel-operated hydraulic motor type stern propulsion apparatus for boats and hydraulic system for controlling the same3US 6,547,610 B2Korea Institute of Machinery & Materials · 2003