E21D 23/12
Control
Official title: Control, e.g. using remote control (E21D23/16 takes precedence)
E21D23/12 (Control) appears on 97 US grants and 53 published applications in this corpus.
Search patents in E21D- Granted patents
- 97
- Published applications
- 53
- Assignees
- 55
- Inventors
- 166
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 4 | 2 |
| 2004 | 0 | 3 |
| 2005 | 1 | 0 |
| 2006 | 1 | 6 |
| 2007 | 1 | 0 |
| 2008 | 5 | 2 |
| 2009 | 2 | 1 |
| 2010 | 1 | 2 |
| 2011 | 0 | 4 |
| 2012 | 0 | 3 |
| 2013 | 4 | 2 |
| 2014 | 3 | 5 |
| 2015 | 6 | 3 |
| 2016 | 3 | 1 |
| 2017 | 2 | 5 |
| 2018 | 2 | 1 |
| 2019 | 2 | 0 |
| 2020 | 4 | 3 |
| 2021 | 2 | 3 |
| 2022 | 2 | 2 |
| 2023 | 2 | 1 |
| 2024 | 0 | 3 |
| 2025 | 1 | 0 |
| 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
- Detection device and method for working surface, terminal, and storage medium24 Mar 2026US 12,584,410 B2Taiyuan University of Technology
- Hydraulic support with quick response function for coal wall spalling8 Jul 2025US 12,352,169 B2Shandong University of Science and Technology
- Method and device for monitoring operation of a mining machine unit5 Sep 2023US 11,746,655 B2Caterpillar Inc.
- Roof support including extendable links23 May 2023US 11,655,711 B2Joy Global Underground Mining LLC
- Underground mining system and method30 Jul 2026US 2026/0218612 A1
- 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
- Detection device and method for working surface, terminal, and storage medium11 Apr 2024US 2024/0117740 A1Taiyuan University of Technology
- Hydraulic Support with Quick Response Function for Coal Wall Spalling25 Jan 2024US 2024/0026788 A1Shandong University of Science and Technology
- Roof support including extendable links3 Aug 2023US 2023/0243260 A1Joy Global Underground Mining LLC
Most cited
By later US patents
- Long range multiple point wireless control and monitoring system121US 4,968,978 AStolar, Inc. · 1990
- Long range multiple point wireless control and monitoring system86US 5,087,099 AStolar, Inc. · 1992
- Method of transmitting data from a drillhead57US 5,268,683 AStolar, Inc. · 1993
- Method of controlling the movement of a longwall excavation front, especially the face or breast of a coal seam29US 4,887,935 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1989
- Method and a device for detecting the presence of personnel in underground mining28US 6,512,312 B1DBT Automation GmbH · 2003