E21D9/106 - CPC Classification Index

ClassID:

136009 ⎘

E21D9/106 - CPC Classification

Classification description:

Tunnels or galleries, with or without linings; Methods or apparatus for making thereof ; Layout of tunnels or galleries; Making by using boring or cutting machines with percussive tools, e.g. pick-hammers

Recent Application in this class:

20210003009

2021-01-07

Combined rock-breaking TBM tunneling method in complex strata for realizing three-way force detection

20200285787

2020-09-10

VIBRATION REDUCTION OPTIMIZATION METHOD FOR HOST SYSTEM OF TUNNEL BORING MACHINE

20190195022

2019-06-27

Enhanced endcap ram accelerator system

20180195388

2018-07-12

Drilling and bursting heading machine

20150130256

2015-05-14

ROLLING FRICTION OR SUSPENSION FRICTION IMPACT MINING METHOD AND WEAR-RESISTANT IMPACT MINING MACHINE USING SAID METHOD

20140346840

2014-11-27

Tool for breaking hammer, breaking hammer, and use thereof