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Title of patent family (most common patent title) |
Family members |
Filing year |
---|---|---|
tail rope hanging device and multi-rope friction wheel type vertical shaft hoisting syst… 🛈 | 2 | 2011 |
liquid transfer device and liquid supply equipment with same | 2 | 2012 |
stone drift fully-mechanized excavating surface dust removing system | 2 | 2013 |
shotcrete additive and spraying technology of shotcrete | 2 | 2010 |
flow guide pipe for gas drainage and gas acquisition device | 2 | 2010 |
mine laneway generation system and method | 2 | 2010 |
main belt conveyor tail self-cleaning belt conveyor and main belt conveyor tail self-cle… 🛈 | 2 | 2013 |
inclined drift rail transport protection system | 2 | 2013 |
construction method of coal mine geological three-dimensional model and system thereof | 2 | 2010 |
method and system for fixing coal-bed gas extraction wells | 2 | 2010 |