E21C 39/00
Devices for testing in situ the hardness or other properties of minerals
Official title: Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools
E21C39/00 (Devices for testing in situ the hardness or other properties of minerals) appears on 96 US grants and 77 published applications in this corpus.
Search patents in E21C- Granted patents
- 96
- Published applications
- 77
- Assignees
- 81
- Inventors
- 369
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 4 | 2 |
| 2003 | 0 | 1 |
| 2004 | 2 | 2 |
| 2005 | 0 | 3 |
| 2006 | 1 | 1 |
| 2007 | 0 | 4 |
| 2008 | 3 | 2 |
| 2009 | 3 | 1 |
| 2010 | 2 | 3 |
| 2011 | 3 | 1 |
| 2012 | 0 | 2 |
| 2013 | 2 | 3 |
| 2014 | 3 | 1 |
| 2015 | 2 | 2 |
| 2016 | 1 | 0 |
| 2017 | 1 | 4 |
| 2018 | 3 | 4 |
| 2019 | 4 | 2 |
| 2020 | 3 | 6 |
| 2021 | 6 | 5 |
| 2022 | 2 | 9 |
| 2023 | 6 | 6 |
| 2024 | 12 | 5 |
| 2025 | 6 | 2 |
| 2026 | 1 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Tunnel tunneling system3 Mar 2026US 12,565,837 B2Ccteg Taiyuan Research Institute
- Method and system for determining a soil class and use during determination of a soil class21 Oct 2025US 12,448,886 B2TRACTO-TECHNIK GmbH & Co. KG
- Raise caving method for mining deposits, and a mining infrastructure, monitoring system, machinery, control system and data medium therefor21 Oct 2025US 12,448,889 B2Luossavaara-Kiirunavaara AB
- Mounting device and method of tandem-type rock mass three-dimensional disturbance stress sensor5 Aug 2025US 12,379,271 B1Institute of Rock and Soil Mechanics, Chinese Academy of Sciences
- Device and method for driving a tunnel15 Jul 2025US 12,359,566 B2Herrenknecht AG
- Detection-While-Drilling Device for Composite Rock Stratum Structures and Intelligent Identification Method23 Jul 2026US 2026/0210932 A1China University of Mining and Technology
- Method and device for monitoring generation of coal mine vibration and its response to vibration wave11 Jun 2026US 2026/0160910 A1Shandong University of Science and Technology
- Method for determining feasibility of water-preserving mining with in-situ protection of floor confined water4 Jun 2026US 2026/0153426 A1China University of Mining and Technology
- Raise caving method for mining deposits, and a mining infrastructure, monitoring system, machinery, control system and data medium therefor14 May 2026US 2026/0132716 A1Luossavaara-Kiirunavaara AB
- System and method for selecting drilling recipes based on rock hardness2 Apr 2026US 2026/0092523 A1Sandvik Mining and Construction USA, LLC
Most cited
By later US patents
- Excavator data acquisition and control system and process123US 5,704,142 AVermeer Manufacturing Company · 1998
- Excavator data acquisition and control system and method of use109US 5,553,407 AVermeer Manufacturing Company · 1996
- Excavator data acquisition and control system and process103US 5,659,985 AVermeer Manufacturing Company · 1997
- Excavator data acquisition and control system and process80US 6,195,922 B1Vermeer Manufacturing Company · 2001
- Excavator data acquisition and control system and process73US 6,119,376 AVermeer Manufacturing Company · 2000