E21D 23/142
Measuring the advance of support units with respect to external points of
Official title: {Measuring the advance of support units with respect to external points of reference}
E21D23/142 (Measuring the advance of support units with respect to external points of) appears on 10 US grants and 3 published applications in this corpus.
Search patents in E21D- Granted patents
- 10
- Published applications
- 3
- Assignees
- 11
- Inventors
- 21
- Latest grant
- 5 Sep 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
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| 2002 | 1 | 0 |
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| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
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| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method and device for monitoring operation of a mining machine unit5 Sep 2023US 11,746,655 B2Caterpillar Inc.
- Method for implementing a centralized control platform of hydraulic support on fully mechanized mining working face in underground coal mines19 May 2020US 10,655,467 B2Taiyuan University of Technology
- Method for determining the position or situation of installation components in mineral mining installations and mining installation15 Jul 2014US 8,777,325 B2Caterpillar Global Mining Europe GmbH
- Control system for longwall face alignment19 Nov 2002US 6,481,802 B1Tiefenbach Bergbautechnik GmbH
- Cutting apparatus for mining operations with automatic control10 Aug 1993US 5,234,256 ATiefenbach GmbH
- Method and device for monitoring operation of a mining machine unit5 May 2022US 2022/0136390 A1Caterpillar SARL
- Method for implementing a centralized control platform of hydraulic support on fully mechanized mining working face in underground coal mines17 May 2018US 2018/0135412 A1Taiyuan University of Technology
- Method for determining the position or situation of installation components in mineral mining installations and mining installation19 Apr 2012US 2012/0091782 A1Bucyrus Europe GmbH
Most cited
By later US patents
- Control system for longwall face alignment16US 6,481,802 B1Tiefenbach Bergbautechnik GmbH · 2002
- Mining apparatus11US 4,330,154 ADowty Mining Equipment Limited · 1982
- Personnel detection and protection systems for use in underground mines8US 4,722,574 ACoal Industry (Patents) Limited · 1988
- Methods and apparatus for maintaining longwall face alignment8US 5,020,860 AConsolidation Coal Company · 1991
- Method for determining the position or situation of installation components in mineral mining installations and mining installation8US 8,777,325 B2Caterpillar Global Mining Europe GmbH · 2014