B63B 21/44
With two or more flukes
Official title: with two or more flukes
B63B21/44 (With two or more flukes) appears on 72 US grants and 13 published applications in this corpus.
Search patents in B63B- Granted patents
- 72
- Published applications
- 13
- Assignees
- 20
- Inventors
- 78
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 7 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 2 | 1 |
| 2006 | 3 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 3 |
| 2020 | 3 | 2 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Portable marine anchoring device and portable fender8 Sep 2026US 12,728,957 B2
- Collapsable anchor12 Sep 2023US 11,753,117 B2Sandshark, Inc.
- Flat anchor with claws17 May 2022US 11,332,218 B2
- Radial arm double shank split crown self-releasing mechanism anchor8 Dec 2020US 10,858,074 B1
- Underwater vehicle having directional effector6 Oct 2020US 10,793,242 B2Raytheon Company
- Portable marine anchoring device and portable fender25 Jun 2026US 2026/0175948 A1WavesRX, LLC
- Portable marine anchoring device and portable fender11 Jun 2026US 2026/0159197 A1
- Collapsable anchor9 Feb 2023US 2023/0043734 A1Sandshark, Inc.
- Flat anchor with claws19 Nov 2020US 2020/0361570 A1
- Underwater vehicle having directional effector4 Jun 2020US 2020/0172216 A1Raytheon Company
Most cited
By later US patents