B63H 21/38
Apparatus or methods specially adapted for use on marine vessels, for handling
Official title: Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like ({in outboard drives B63H20/001; } lubricating or cooling machines or engines in general F01 - F04)
B63H21/38 (Apparatus or methods specially adapted for use on marine vessels, for handling) appears on 502 US grants and 456 published applications in this corpus.
Search patents in B63H- Granted patents
- 502
- Published applications
- 456
- Assignees
- 227
- Inventors
- 1,024
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 8 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 10 | 0 |
| 1995 | 6 | 0 |
| 1996 | 10 | 0 |
| 1997 | 7 | 0 |
| 1998 | 14 | 0 |
| 1999 | 10 | 0 |
| 2000 | 14 | 0 |
| 2001 | 12 | 4 |
| 2002 | 20 | 16 |
| 2003 | 19 | 23 |
| 2004 | 23 | 16 |
| 2005 | 16 | 4 |
| 2006 | 9 | 7 |
| 2007 | 6 | 3 |
| 2008 | 2 | 3 |
| 2009 | 5 | 8 |
| 2010 | 3 | 5 |
| 2011 | 4 | 15 |
| 2012 | 8 | 15 |
| 2013 | 10 | 11 |
| 2014 | 18 | 15 |
| 2015 | 15 | 35 |
| 2016 | 13 | 19 |
| 2017 | 21 | 23 |
| 2018 | 14 | 33 |
| 2019 | 27 | 24 |
| 2020 | 27 | 21 |
| 2021 | 17 | 10 |
| 2022 | 16 | 16 |
| 2023 | 11 | 20 |
| 2024 | 21 | 50 |
| 2025 | 23 | 33 |
| 2026 | 26 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Thermal management systems for marine vessels6 Oct 2026US 12,752,901 B1Brunswick Corporation
- Power-saving liquefied-gas-fuel ship and method for processing boil-off gas for liquefied-gas-fuel ship6 Oct 2026US 12,753,884 B2Hanwha Ocean Co., Ltd.
- Marine drives and methods of clearing debris from a cooling water intake on marine drives29 Sep 2026US 12,747,014 B1Brunswick Corporation
- Oil filtration and lubrication system for sealing system of azimuth thruster15 Sep 2026US 12,735,165 B2Steerprop Oy
- Multi-channel flow control system15 Sep 2026US 12,736,069 B2Industrial Technology Research Institute
- Combined fuel level sending unit and fuel fill limit vent valve8 Oct 2026US 2026/0307473 A1Whitecap Industries, Inc.
- Fuel supply device1 Oct 2026US 2026/0298185 A1Nikki Co., Ltd.
- Fuel tank system17 Sep 2026US 2026/0274064 A1Elkhart Plastics LLC
- Gas treatment system and ship including same10 Sep 2026US 2026/0264812 A1Korea Shipbuilding & Offshore Engineering Co., Ltd.
- Marine engine ammonia catch system and ammonia fuel recovery method using same3 Sep 2026US 2026/0257767 A1Korea Institute of Energy Research
Most cited
By later US patents
- Fuel handling system65US 5,579,740 AWalbro Corporation · 1996
- Marine engine cooling system with a check valve to facilitate draining52US 6,379,201 B1Brunswick Corporation · 2002
- Four-cycle engine for a small jet boat47US 5,846,102 AKawasaki Jukogyo Kabushiki Kaisha · 1998
- Closed loop cooling for a marine engine46US 5,004,042 ABrunswick Corporation · 1991
- Engine lubricating system for watercraft41US 5,951,343 AYamaha Hatsudoki Kabushiki Kaisha · 1999