| Patents for E21D 21 - Anchoring-bolts for roof, floor, or shaft-lining protection (4,377) |
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| 12/21/2003 | CA2723330A1 Yielding strata bolt |
| 12/18/2003 | DE10219155C1 Bergbaumetalldübel Metal mining plug |
| 12/11/2003 | WO2003102374A1 Threaded bar & rock bolts formed therefrom |
| 12/10/2003 | CN2591229Y Retractable whole-anchoring-bolt |
| 12/04/2003 | WO2003100177A1 Anchor system for elongation control |
| 12/03/2003 | EP0960266B1 A cable bolt |
| 12/02/2003 | US6655889 Washer for a chemical anchor |
| 11/27/2003 | US20030219316 Rock bolt |
| 11/20/2003 | WO2003095796A1 Roof bolts for use in mines, a method for their production and a method for their installation |
| 11/20/2003 | CA2485457A1 Roof bolts for use in mines, a method for their production and a method for their installation |
| 11/19/2003 | CN1456790A Prestressed anchor pin with sand solidified inner head and its anchoring method |
| 11/18/2003 | US6648557 Drilling apparatus and method for single pass bolting |
| 11/13/2003 | WO2003093644A1 Method for production of a mining metal plug |
| 11/13/2003 | US20030210967 Roof bolts for use in mines, a method for their production and a method for their installation |
| 11/12/2003 | EP1361336A1 Anchoring element |
| 11/06/2003 | WO2003091542A1 Rock bolt |
| 11/06/2003 | US20030206774 Anchor |
| 11/05/2003 | CN2584831Y Tensile pipe for tunnel reinforcing |
| 11/05/2003 | CN2584830Y Continuous glass fibre reinforced thermoplastic plastics anchoring bolt |
| 11/04/2003 | US6640914 Percussion borer for forming bores in stone material |
| 10/29/2003 | CN2583361Y Direct-reading tension-measuring anchor rod |
| 10/29/2003 | CN2583360Y Prestressed steel rope roofbolt |
| 10/28/2003 | US6637980 Method and apparatus for re-tensioning a roof bolt in an underground mine |
| 10/23/2003 | WO2003087538A1 A rock bolt |
| 10/22/2003 | EP1075587B1 Device for a rock wall |
| 10/16/2003 | US20030194278 Device for drilling and anchoring and process for placing grout anchors |
| 10/15/2003 | EP1090207B1 Tie rod especially for securing rock walls, and a method for producing such a tie rod |
| 10/08/2003 | EP1027529B1 Apparatus for bending and cutting cable in rock bolting equipment |
| 10/02/2003 | US20030185634 Synthetic deformed bars and retaining walls |
| 10/02/2003 | US20030185632 Cable bolt apparatus and method of installation for mines |
| 09/30/2003 | US6626610 Cable bolt apparatus and method of installation for mines |
| 09/25/2003 | US20030180098 Mobile system for manufacturing and installing reinforcing members |
| 09/24/2003 | CN1121914C Method for maochining rod body of anchor bolt and special equipment for machining spiral thread segment of rod body |
| 09/16/2003 | US6619888 Flange nut for mine roof bolt |
| 09/10/2003 | CN2572372Y Steel string type force-measuring anchor rod |
| 09/02/2003 | US6612783 Cable bolt with mixing delay device |
| 08/28/2003 | WO2003071098A1 Rock bolt |
| 08/27/2003 | CN2568815Y Strengthening slip casting anchor stock |
| 08/21/2003 | WO2003069122A2 Strain detection in rock bolts |
| 08/21/2003 | CA2470172A1 Instrumented rock bolt, data logger and user interface system |
| 08/20/2003 | CN2567341Y Self-archoring slip casting archoring-balt |
| 08/20/2003 | CN2567340Y Compound hollow rockbolt |
| 08/13/2003 | CN2565988Y Recoverable anchor rod for roof supporting |
| 08/13/2003 | CN2565987Y Sprial tip-rib anchor rod and sprial rib drill rod for drilling sprial tip-rib anchor rod hole |
| 08/06/2003 | CN2564755Y 3-D anchorage cable |
| 07/31/2003 | WO2003062599A1 Rock bolts with an expandable element |
| 07/30/2003 | CN2563310Y High power anchorage cable |
| 07/29/2003 | US6599059 Three-prong shell |
| 07/23/2003 | EP1119687B1 Jacket tube for a drilling and anchoring device |
| 07/23/2003 | CN2561935Y Sectional hollow slip anchor rod |
| 07/17/2003 | WO2003058033A1 A rock bolt |
| 07/17/2003 | WO2003058032A1 Longwall mining method and apparatus |
| 07/17/2003 | WO2003058003A2 Multiple synthetic deformed bars and retaining walls |
| 07/17/2003 | US20030133758 Method for setting anchoring bolts in mines |
| 07/16/2003 | CN2560758Y Spiral sharp-rib roofbolt and spiral-rib drill rod for drilling spiral sharp-rib roofbolt hole |
| 07/09/2003 | EP1206625B1 Spreading anchor |
| 07/08/2003 | US6588986 Device for drilling and anchoring and process for placing grout anchors |
| 07/02/2003 | CN1427139A Composite rockbolt |
| 06/25/2003 | CN2557697Y All screw glass fibre roofbolt |
| 06/11/2003 | EP1317603A2 Mobile system for manufacturing and installing reinforcing members |
| 06/10/2003 | CA2122945C Rock bolt shell and cone |
| 06/04/2003 | CN2554353Y Expansion anchor rod with telescopic rod |
| 05/28/2003 | EP0843775A4 A method for reinforcing rock with a tendon |
| 05/27/2003 | CA2147182C Ribbed flexible member for casting into an anchorage medium |
| 05/22/2003 | WO2003042501A1 Rock bolt |
| 05/13/2003 | US6561721 Cable bolt with a yielding fixture and method of forming the same |
| 05/07/2003 | CN2549179Y Threaded fastening cable anchor rod |
| 05/07/2003 | CN1415844A Protecting cover of termination point of anchor rod and its use |
| 05/07/2003 | CN1415843A Anchor cable supporting and method for mfg. anchor cable by using worn-out steel cable |
| 04/30/2003 | CN2547876Y Wedge-shaped anchoring bolt |
| 04/30/2003 | CN2547875Y Cold press head equal-strength anchoring bolt |
| 04/29/2003 | US6554368 Method and system for mining hydrocarbon-containing materials |
| 04/24/2003 | WO2003033877A1 A rock anchor load indicator |
| 04/24/2003 | WO2002079070A3 Surface control bearing plate |
| 04/09/2003 | EP1300546A1 Injection drilling anchor |
| 04/02/2003 | CN2542830Y Mine anchorage cable |
| 03/27/2003 | WO2003025345A1 Strata control |
| 03/26/2003 | CN2541605Y Wedge anchor arm |
| 03/20/2003 | WO2003023190A1 Roof bolts for use in mines, a method for their production and method for their installation |
| 03/20/2003 | US20030052153 Arrangement for feeding soldering material |
| 03/19/2003 | CN1403687A Making process of integrated forming rock anchoring screw bolt with center hole |
| 03/13/2003 | WO2003021081A1 A yielding rock bolt |
| 03/06/2003 | WO2003018916A1 Disjointable fixing apparatus of tension member and removal method of tension member |
| 03/05/2003 | CN1400378A Mine roadway steel reinforcement support anchoring method |
| 03/04/2003 | US6527482 Grit surface cable products |
| 02/27/2003 | US20030039514 Surface control bearing plate |
| 02/27/2003 | US20030038526 Method and system for mining hydrocarbon-containing materials |
| 02/26/2003 | CN1399059A Spiral sharp-rib anchor rod and spiral rib drilling rod for drilling hole of spiral sharp-rib anchor rod |
| 02/20/2003 | WO2003014517A1 A grouted friction stabiliser |
| 02/20/2003 | CA2690916A1 A grouted friction stabiliser |
| 02/20/2003 | CA2690301A1 A grouted friction stabiliser |
| 02/19/2003 | EP1283942A1 Method for setting anchoring bolts in mines |
| 02/13/2003 | US20030031525 Resin embedded rock bolt |
| 02/13/2003 | DE10131818C1 Bore injection anchor for tunnel construction has anchor sleeve pressed to provide oval cross-section with rotation of its symmetry planes through 90 degrees from section to section |
| 02/12/2003 | CN2535561Y Full-length multi-point wedge-expansion type pipe seam anchor-rod |
| 02/12/2003 | CN2535540Y Anchor-red recovering driller |
| 02/11/2003 | CA2229367C Tensionable cable bolt with mixing assembly |
| 02/06/2003 | US20030026664 Rock stabilizing apparatus and method |
| 02/05/2003 | CN1395025A Full-length multi-point wedge-expanded pipe seam anchor bar |
| 02/04/2003 | US6514013 Anchor rod with surface areas and friction |