B63B 3/38
Keels
Official title: Keels (movable keels B63B41/00)
B63B3/38 (Keels) appears on 141 US grants and 119 published applications in this corpus.
Search patents in B63B- Granted patents
- 141
- Published applications
- 119
- Assignees
- 78
- Inventors
- 220
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 5 | 3 |
| 2004 | 1 | 4 |
| 2005 | 3 | 6 |
| 2006 | 2 | 2 |
| 2007 | 4 | 1 |
| 2008 | 3 | 4 |
| 2009 | 3 | 6 |
| 2010 | 1 | 4 |
| 2011 | 5 | 4 |
| 2012 | 1 | 4 |
| 2013 | 5 | 5 |
| 2014 | 3 | 9 |
| 2015 | 6 | 12 |
| 2016 | 11 | 2 |
| 2017 | 9 | 5 |
| 2018 | 7 | 5 |
| 2019 | 6 | 6 |
| 2020 | 7 | 7 |
| 2021 | 5 | 8 |
| 2022 | 6 | 2 |
| 2023 | 3 | 4 |
| 2024 | 1 | 6 |
| 2025 | 3 | 6 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Flotation body for personal watercraft2 Jun 2026US 12,643,633 B2Taiga Motors Inc.
- Bow thruster module and related methods10 Mar 2026US 12,570,388 B1Correct Craft IP Holdings, LLC
- Modular keel30 Sep 2025US 12,428,107 B1Rafnar Ehf
- Maritime apparatus28 Jan 2025US 12,208,867 B2Sea Transport Design Pty Ltd
- Ventilated boat keel21 Jan 2025US 12,202,578 B1
- Swing Keel for Multi-Hull Boats to Enhance Steering and Docking Maneuverability1 Oct 2026US 2026/0296598 A1
- Modular keel21 May 2026US 2026/0138707 A1Rafnar Ehf
- Hull assembly for a personal watercraft11 Dec 2025US 2025/0376244 A1Bombardier Recreational Products Inc.
- Micro-keel cooler for maritime vehicle4 Sep 2025US 2025/0276761 A1Saronic Technologies
- Water jet propulsion boat and boat14 Aug 2025US 2025/0256811 A1Yamaha Hatsudoki Kabushiki Kaisha
Most cited
By later US patents
- Water trampoline device62US 5,810,695 A1998
- Bodies with reduced surface drag55US 4,786,016 AUnited Technologies Corporation · 1988
- Motorized surfboard device50US 6,409,560 B12002
- Fast self righting catamaran41US 4,610,212 A1986
- Offshore floating production, storage, and off-loading vessel for use in ice-covered and clear water applications38US 7,958,835 B22011