E21F13/042 - CPC Classification Index

ClassID:

136288 ⎘

E21F13/042 - CPC Classification

Classification description:

Transport specially adapted to underground conditions in gravity inclines Transport of mined material ; in staple or inclined shafts Vertical hydraulic conveying of coal

Recent Application in this class:

20210371216

2021-12-02

Transport and hoisting of slurry

20170210573

2017-07-27

Hydraulic hoisting system and method

20150097413

2015-04-09

Apparatus and method for storing waste material

20140056646

2014-02-27

Apparatus and method for mining coal

20130193743

2013-08-01

Apparatus and Method for Mining Coal

20120319452

2012-12-20

Apparatus and method for mining coal

20110311321

2011-12-22

Hydraulic solid transportation system

20110049965

2011-03-03

Apparatus and method for mining coal