E21D 21/0086
Bearing plates
Official title: {Bearing plates}
E21D21/0086 (Bearing plates) appears on 84 US grants and 65 published applications in this corpus.
Search patents in E21D- Granted patents
- 84
- Published applications
- 65
- Assignees
- 49
- Inventors
- 177
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 2 |
| 2002 | 1 | 3 |
| 2003 | 3 | 1 |
| 2004 | 1 | 2 |
| 2005 | 1 | 2 |
| 2006 | 0 | 1 |
| 2007 | 1 | 2 |
| 2008 | 1 | 1 |
| 2009 | 1 | 5 |
| 2010 | 1 | 3 |
| 2011 | 2 | 2 |
| 2012 | 2 | 0 |
| 2013 | 2 | 4 |
| 2014 | 2 | 6 |
| 2015 | 2 | 3 |
| 2016 | 2 | 3 |
| 2017 | 0 | 1 |
| 2018 | 3 | 4 |
| 2019 | 3 | 3 |
| 2020 | 4 | 2 |
| 2021 | 2 | 4 |
| 2022 | 2 | 0 |
| 2023 | 0 | 2 |
| 2024 | 1 | 5 |
| 2025 | 1 | 2 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Tunnel constraint anchor cable and method for improving stability of initial support structure14 Jul 2026US 12,680,451 B2Chang An University
- Autonomous roof bolter with sensor and related methods16 Jun 2026US 12,655,761 B2J.H. Fletcher & Co.
- Rock bolt28 Apr 2026US 12,612,861 B2Sandvik Mining and Construction Australia (Production/Supply) Pty Ltd
- Dolly for rockbolt2 Dec 2025US 12,486,769 B2FCI Holdings Delaware, Inc.
- Multi-stage pressure yielding and anti-impact device for anchoring support29 Oct 2024US 12,129,760 B2Shandong University of Science and Technology
- Rock Bolt Device with Replaceable Head16 Apr 2026US 2026/0103982 A1
- Dolly for Rockbolt26 Feb 2026US 2026/0055706 A1FCI Holdings Delaware, Inc.
- A Mine Bearing Element4 Dec 2025US 2025/0369355 A1Engenex Pty Ltd
- Rock bolt21 Aug 2025US 2025/0264022 A1Sandvik Mining and Construction Australia (Production/Supply) Pty Ltd
- Tunnel constraint anchor cable and method for improving stability of initial support structure7 Nov 2024US 2024/0368991 A1Chang An University
Most cited
By later US patents
- Mine roof bearing plate63US 4,371,293 A1983
- Mine roof support plate56US 4,112,693 AKaiser Steel Corporation · 1978
- Bearer plate47US 5,628,587 ATru-Di Tool Manufacturing Co., Pty. Ltd. · 1997
- Mine roof plate31US 4,445,808 AIngersoll-Rand Company · 1984
- Reinforcing washer for a mine roof bolt assembly29US 4,708,559 AF. M. Locotos Co., Inc. · 1987