E21D 23/0004
Along the working face
Official title: {along the working face}
E21D23/0004 (Along the working face) appears on 149 US grants and 30 published applications in this corpus.
Search patents in E21D- Granted patents
- 149
- Published applications
- 30
- Assignees
- 66
- Inventors
- 211
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 18 | 0 |
| 1978 | 26 | 0 |
| 1979 | 7 | 0 |
| 1980 | 11 | 0 |
| 1981 | 11 | 0 |
| 1982 | 4 | 0 |
| 1983 | 7 | 0 |
| 1984 | 6 | 0 |
| 1985 | 7 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 3 |
| 2012 | 0 | 2 |
| 2013 | 4 | 0 |
| 2014 | 0 | 2 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 5 |
| 2018 | 3 | 1 |
| 2019 | 3 | 1 |
| 2020 | 1 | 6 |
| 2021 | 4 | 0 |
| 2022 | 0 | 0 |
| 2023 | 2 | 4 |
| 2024 | 2 | 1 |
| 2025 | 0 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for controlling roof support18 Aug 2026US 12,709,982 B2Joy Global Underground Mining LLC
- Asymmetric hydraulic supports for pseudo inclined mining in steeply dipping seam13 Jan 2026US 12,523,151 B2XI'AN UNIVERSITY OF SCIENCE AND TECHNOLOGY Xi'an, China
- Mining shield base lift methods12 Nov 2024US 12,138,721 B2
- Mining shield base lift wear pad1 Oct 2024US 12,103,124 B2
- Mining shield base lift apparatuses and methods3 Oct 2023US 11,772,209 B1Swanson Industries, Inc.
- Underground mining system and method30 Jul 2026US 2026/0218612 A1
- Asymmetric hydraulic supports for pseudo inclined mining in steeply dipping seam10 Apr 2025US 2025/0116192 A1Xi'an University of Science and Technology
- Digital speed regulating valve for aligning hydraulic supports in fully mechanized mining face and control method thereof5 Dec 2024US 2024/0401480 A1Taiyuan University of Technology
- Mining shield base lift methods21 Dec 2023US 2023/0405740 A1Swanson Industries, Inc.
- Mining shield base lift wear pad21 Dec 2023US 2023/0405741 A1Swanson Industries, Inc.
Most cited
By later US patents
- Tunnel layout for longwall mining using shields22US 3,960,408 AWorld Oil Mining Ltd. · 1976
- Mine roof support assembly20US 4,217,067 AGewerkschaft Eisenhutte Westfalia · 1980
- Assembly for preventing the fall of dust and debris in a mine18US 4,003,208 A1977
- Mine roof support and method in longwall mining of thick mineral seams17US 4,065,929 AAtlantic Richfield Company · 1978
- Mining method and apparatus15US 4,102,550 APeabody Coal Company · 1978