E21D 21/008
Anchoring or tensioning means
Official title: {Anchoring or tensioning means}
E21D21/008 (Anchoring or tensioning means) appears on 287 US grants and 179 published applications in this corpus.
Search patents in E21D- Granted patents
- 287
- Published applications
- 179
- Assignees
- 138
- Inventors
- 427
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 8 | 0 |
| 1982 | 3 | 0 |
| 1983 | 11 | 0 |
| 1984 | 5 | 0 |
| 1985 | 14 | 0 |
| 1986 | 8 | 0 |
| 1987 | 8 | 0 |
| 1988 | 4 | 0 |
| 1989 | 6 | 0 |
| 1990 | 6 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 9 | 0 |
| 1994 | 8 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 8 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 1 |
| 2002 | 2 | 5 |
| 2003 | 5 | 3 |
| 2004 | 3 | 4 |
| 2005 | 2 | 5 |
| 2006 | 8 | 6 |
| 2007 | 2 | 4 |
| 2008 | 2 | 4 |
| 2009 | 3 | 11 |
| 2010 | 2 | 7 |
| 2011 | 11 | 10 |
| 2012 | 9 | 11 |
| 2013 | 2 | 10 |
| 2014 | 9 | 6 |
| 2015 | 4 | 11 |
| 2016 | 3 | 6 |
| 2017 | 5 | 6 |
| 2018 | 6 | 10 |
| 2019 | 12 | 8 |
| 2020 | 10 | 15 |
| 2021 | 10 | 10 |
| 2022 | 9 | 3 |
| 2023 | 3 | 5 |
| 2024 | 3 | 10 |
| 2025 | 6 | 4 |
| 2026 | 6 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Deformable anchor cable28 Jul 2026US 12,692,791 B2Fuzhou University
- Tunnel constraint anchor cable and method for improving stability of initial support structure14 Jul 2026US 12,680,451 B2Chang An University
- Active control method and device for large deformation of deep thin-bedded surrounding rock9 Jun 2026US 12,650,076 B2Huaneng Lancang River Hydropower Inc.
- Rock bolt28 Apr 2026US 12,612,861 B2Sandvik Mining and Construction Australia (Production/Supply) Pty Ltd
- Dynamic rockbolt21 Apr 2026US 12,607,123 B2FCI Holdings Delaware, Inc.
- Rock bolt17 Sep 2026US 2026/0275866 A1Sandvik Mining and Construction Australia (Production/Supply) Pty Ltd
- Rock bolt13 Aug 2026US 2026/0235029 A1Sandvik Mining and Construction Australia (Production/Supply) Pty Ltd
- Geothermal-based self-compensating expansion shell rock bolt13 Aug 2026US 2026/0235030 A1China University of Geosciences (Wuhan)
- Dolly for Rockbolt26 Feb 2026US 2026/0055706 A1FCI Holdings Delaware, Inc.
- A Mine Bearing Element4 Dec 2025US 2025/0369355 A1Engenex Pty Ltd
Most cited
By later US patents
- Process, anchoring member, and clamping device for clamping a rod111US 5,022,791 AH. Weidmann AG · 1991
- Mine roof anchor bolt98US 4,556,350 A1985
- Self-seating expansion anchor72US 5,161,916 A1992
- Mine roof bolt53US 5,259,703 A1993
- Resin reinforced expansion anchor system42US 4,764,055 ABirmingham Bolt Company · 1988