E21D21/0093 - CPC Classification Index

#1

20260103982

2026-04-16

Rock Bolt Device with Replaceable Head

#2

20260063036

2026-03-05

ADAPTER FOR ROCK OR BUILDING ANCHOR SYSTEM

#3

20260055706

2026-02-26

Dolly for Rockbolt

#4

20260002635

2026-01-01

SENSOR APPARATUS FOR USE IN A TUNNEL

#5

20240360760

2024-10-31

Dolly for Rockbolt

#6

20230023293

2023-01-26

Rock bolt assembly comprising a sensor assembly

#7

20220356804

2022-11-10

Rock bolt with information display region

#8

20220325626

2022-10-13

CONNECTION DEVICE AND SYSTEM FOR SUSPENDING A MONORAIL BEAM FROM A ROOF BOLT

#9

20210324739

2021-10-21

Retainer device for a rock anchor, rock anchor system and associated installation method

#10

20210172318

2021-06-10

Rock bolt with information display region

#11

20210087931

2021-03-25

Grouting bolt-cable composite beam and supporting method for advanced support of fractured surrounding rock in deep coal mines

#12

20200408093

2020-12-31

Safety system and method for protecting against a hazard of drill rod failure in a drilled rock bore

#13

20200363278

2020-11-19

Method and system for component wear monitoring

#14

20200318479

2020-10-08

Rock bolt with meshing adapter

#15

20200217201

2020-07-09

Extensible reaming self-anchoring anchor rod and supporting method thereof

#16

20200173281

2020-06-04

ROCK BOLT WITH RELEASEABLY FIXABLE BUNG

#17

20200072051

2020-03-05

Retainer device for a rock anchor, rock anchor system and associated installation method

#18

20200011177

2020-01-09

Rock bolt installation tool

#19

20190211675

2019-07-11

Rock anchor inflation and draining system

#20

20190169987

2019-06-06

Anchoring method utilizing self-drilling and self-anchoring extendable anchor rod applicable to soft and weak coal rocks

#21

20190162068

2019-05-30

EXPANDABLE ROCK BOLT WITH INDICATOR OF CLAMPING

#22

20190063504

2019-02-28

Spline drive drill steel couplers

#23

20180355719

2018-12-13

Mesh supporting rock anchor

#24

20180328175

2018-11-15

Safety system and method for protecting against a hazard of drill rod failure in a drilled rock bore

#25

20180313707

2018-11-01

Method and system for component wear monitoring

#26

20170314394

2017-11-02

End coupling for a rock bolt

#27

20170211385

2017-07-27

Spring suspension clip

#28

20170184434

2017-06-29

BREATHER TUBE INDICATOR

#29

20170009580

2017-01-12

ROCK ANCHOR GROUTING TOOL

#30

20160305243

2016-10-20

Bolt plate magazine and centralizer

#31

20160138397

2016-05-19

ANCHORING AND ANTI-CLOGGING DRILL ROD FOR COAL MINE FLOOR

#32

20160122967

2016-05-05

NON-MECHANICAL ANCHOR

#33

20160025608

2016-01-28

Device, system and method for dynamic testing of ground support bolts, anchor bolts or rock bolts

#34

20160017709

2016-01-21

Anti-Friction Washer System

#35

20150354354

2015-12-10

Rock bolt

#36

20150337659

2015-11-26

Connection means with shape memory

#37

20150322786

2015-11-12

Expandable Bolt With Thrust Element

#38

20150322785

2015-11-12

Rock anchor bolt

#39

20150308269

2015-10-29

Mine roof bolt system

#40

20150300171

2015-10-22

Device, method and system for loading fixatives for rock bolts

#41

20150275667

2015-10-01

MACHINE AND METHOD FOR INSTALLING ROCK BOLTS

#42

20150192013

2015-07-09

TRUSS SYSTEM INSTALLATION

#43

20130183105

2013-07-18

Truss shoe for use with a threaded rod

#44

20130156510

2013-06-20

Rock bolt

#45

20130149041

2013-06-13

Rock bolt and rock bolt component

#46

20120155970

2012-06-21

Mine Roof Bolt With End Fitting

#47

20110297057

2011-12-08

High-strength anchor system, safe room bulkhead, and method of anchoring a support to mine strata

#48

20110142548

2011-06-16

End coupling for a rock bolt

#49

20110079385

2011-04-07

CENTRALISER SEGMENT AND CENTRALISER

#50

20100296891

2010-11-25

Anchor Nut Made of Fibre Reinforced Plastic

#51

20100230909

2010-09-16

Adapter for self-drilling, chemically anchorable fastening element

#52

20100080649

2010-04-01

Cable Coupler Having Retained Wedges

#53

20100074695

2010-03-25

Device for expanding and/or evacuating parts of anchors

#54

20100034595

2010-02-11

Friction stabilizers and roof bolt head markings

#55

20090324343

2009-12-31

Injection bolt with a fixed static mixer

#56

20090191005

2009-07-30

Ground anchor or rock anchor with an anchor tension member comprised of one or more individual elements with corrosion-protected anchor head design

#57

20090074517

2009-03-19

End coupling for a rock bolt

#58

20090022544

2009-01-22

Cable coupler having retained wedges

#59

20060211311

2006-09-21

Cable coupler having retained wedges