B63H 23/36
Shaft tubes
B63H23/36 (Shaft tubes) appears on 31 US grants and 20 published applications in this corpus.
Search patents in B63H- Granted patents
- 31
- Published applications
- 20
- Assignees
- 21
- Inventors
- 61
- Latest grant
- 14 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 2 |
| 2004 | 3 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 3 | 1 |
| 2015 | 0 | 1 |
| 2016 | 2 | 1 |
| 2017 | 1 | 1 |
| 2018 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 1 | 2 |
| 2021 | 1 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 3 |
| 2025 | 2 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Shaft sealing device14 Oct 2025US 12,442,450 B2Eagleburgmann Japan Co., Ltd.
- Vessel propelling system and assembly3 Jun 2025US 12,319,396 B2Seamach Pty Ltd.
- Cooling system for a water-borne vessel31 May 2022US 11,345,456 B2Oceanvolt Oy
- Strut mounted gear box for counter rotating propellers12 Jan 2021US 10,889,362 B2
- Long shaft propeller controller and bearing seal protector14 Jul 2020US 10,710,686 B1
- A thrust generating assembly24 Jul 2025US 2025/0236376 A1Kongsberg Maritime Sweden AB
- Method and Arrangement for Sealing a Propeller Shaft of a Marine Vessel17 Jul 2025US 2025/0229884 A1ABB AB
- Apparatus and methods of sterndrive fixation20 Jun 2024US 2024/0199185 A1EFALKE GmbH
- Shaft sealing device6 Jun 2024US 2024/0183449 A1Eagleburgmann Japan Co., Ltd.
- Vessel propelling system and assembly30 May 2024US 2024/0174335 A1Seamach Pty Ltd.
Most cited
By later US patents
- Pressure control system for stern tube seals27US 4,984,811 ADover Japan, Inc. · 1991
- Bearing and seal assembly for stern tubes of vessels19US 4,395,141 AHowaldtswerke-Deutsche Werft Aktiengesellschaft Hamburg und Kiel · 1983
- Vertically adjustable stern mounted marine drive18US 5,791,954 A1998
- Marine drive shift shaft mounting system16US 5,470,264 ABrunswick Corporation · 1995
- Weed-resistant outboard motor drive system12US 6,669,516 B12003