How many patents does
Datong Coal Mine Group Company have?
patents
447
families
391
granted
54
applications
393
CN
445
WO
1
US
1
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The report contains ten-year analysis with the following sections
- patent filing analysis
- worldwide filing analysis
- patent family analysis
- application analysis
- granted analysis
- classification analysis
- citation analysis
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Datong Coal Mine Group Company
Top ten assignees appearing on patents
2009
Datong Coal Mine Group Company
The top ten patent families are
|
Title of patent family (most common patent title) |
Family members |
Filing year |
|---|---|---|
| method for over-pit and under-pit cooperative control of roofs of far and near fields of… 🛈 | 3 | 2015 |
| small coal pillar protection roadway surrounding rock support method under condition of … 🛈 | 2 | 2015 |
| limiting device for transversally-arranged operating valve handles of hydraulic support | 2 | 2014 |
| method of draining gas in gob through long drill hole in roof trend on fully mechanized … 🛈 | 2 | 2012 |
| comprehensive treatment method of gas on firstly mined permian system working face | 2 | 2012 |
| prevention method for dynamic pressure area of working face | 2 | 2012 |
| water-resisting returnable multi-stage buffer fractured self-deformation self-latching s… 🛈 | 2 | 2012 |
| hydraulic fracturing method of 2-3 meter hard medium sandstone stratum of roof of coal s… 🛈 | 2 | 2012 |
| supporting method of carboniferous system geologic structure in-zone breaking country ro… 🛈 | 2 | 2011 |
| protective circuit of mining scraper conveyor | 2 | 2013 |