| Patents for E21D 21 - Anchoring-bolts for roof, floor, or shaft-lining protection (4,377) |
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| 03/06/1997 | WO1997008430A1 Rockbolt nut assemblies |
| 03/05/1997 | EP0760050A1 Tubeformed rock bolt |
| 03/05/1997 | CN1144550A Rock bolt |
| 02/26/1997 | EP0662018A4 Hollow bars and method of manufacture. |
| 02/18/1997 | US5603589 Method for manufacturing an anchor element for a soil anchor for a rock anchor, rock bolt or the like, from a strand of twisted steel wire |
| 02/11/1997 | CA2045355C Tubular retainer for mine roof expansion anchor and method of use |
| 02/04/1997 | US5599140 Mine roof support system including an expansion anchor with means assisting resin component mixing and method of installation thereof |
| 01/15/1997 | CN2245122Y Self-propelling grouting anchoring-bolt |
| 01/15/1997 | CN2245121Y Self-propelling anchoring-bolt |
| 01/15/1997 | CN2245120Y Compound material wedging anchoring-bolt |
| 12/27/1996 | EP0749518A1 Rock bolt |
| 12/27/1996 | EP0749364A1 Method of securing an anchor with extrusion plastic molding in a solid wall substrate |
| 12/25/1996 | CN2243537Y Two wing expanding pipe anchor rod |
| 12/24/1996 | US5586839 Yieldable cable bolt |
| 12/17/1996 | US5584608 Anchored cable sling system |
| 12/12/1996 | WO1996039610A1 A system for monitoring an earth and/or rock body |
| 12/12/1996 | CA2221492A1 A system for monitoring an earth and/or rock body |
| 12/11/1996 | EP0746669A1 High tensile strand, anchorages and methods of installation thereof |
| 11/27/1996 | EP0437468B1 Rock stabilizer |
| 11/19/1996 | CA2090952C Mine roof expansion anchor and bail element |
| 11/12/1996 | CA2086705C Push-on gripper plate for use with rock bolts |
| 11/05/1996 | US5570976 Cable bolt |
| 10/30/1996 | EP0739442A1 Tensionable gfp rock anchor |
| 10/30/1996 | CN2238911Y Whole-long anchor fixed wedge expansion plastic-steel whole-long archor pin |
| 10/23/1996 | CN1134180A Injection cable bolt |
| 10/22/1996 | CA2022433C Dynamic earth anchor, and a sleeve therefor |
| 10/17/1996 | DE19513202A1 Device for anchoring reinforcing and pre-stressing steel in foundations |
| 10/10/1996 | DE19512122A1 Anchoring bolt for supporting walls of hollow room or tunnel |
| 10/09/1996 | CN1133079A Rock bolt |
| 10/01/1996 | US5560740 Cable attachment device to spin single cables into resinous anchors in boreholes in geologic formation |
| 09/26/1996 | WO1996029483A1 Multilayer traction element in the form of a loop |
| 09/25/1996 | CN2236019Y Mud injecting anchor rod for high-water-contained quick-condensing material |
| 09/25/1996 | CA2150090A1 Mine roof expansion anchor, expansible shell element used therein and method of installation |
| 09/17/1996 | US5556234 Mine roof bolt assembly |
| 09/17/1996 | US5556233 Rock anchor assembly |
| 09/17/1996 | CA2062543C Cable bolt monitoring device |
| 09/10/1996 | CA2092150C Mine roof support system |
| 08/28/1996 | EP0728256A1 Injection cable bolt |
| 08/28/1996 | CN2233985Y Long anchor block |
| 08/21/1996 | CN2233461Y Seal-anchored external anchoring and internal filling anchoring-bolt |
| 08/21/1996 | CN2233460Y Spiral face anchoring-bolt |
| 08/21/1996 | CN1129292A Method for the manufacture of an expansible anchor consisting of corrosion-resistant steel |
| 08/13/1996 | US5544980 For emplacement in a borehole |
| 08/08/1996 | WO1996023959A1 Injection anchor |
| 08/08/1996 | DE19503122A1 Injektionsanker Injection anchor |
| 07/17/1996 | EP0721991A1 Process for manufacturing a stainless steel expanding anchor |
| 07/11/1996 | WO1996021087A1 Rod for an anchor inserted by drilling and injection grouting |
| 07/11/1996 | DE4446625C1 Verpreßventil für einen Injektionsbohranker Verpreßventil for an injection drilling |
| 07/04/1996 | WO1996020331A1 Injection valve |
| 07/02/1996 | US5531545 Cable bolt structure and method |
| 07/02/1996 | CA2073572C Mine roof expansion anchor with improved bore hole engagement means and method of installation thereof |
| 07/02/1996 | CA2072852C Threaded fastener, method of fabrication thereof and method of supporting a mine roof using such a fastener |
| 06/27/1996 | DE4445626A1 Drill anchor for underground mining and tunnelling |
| 06/26/1996 | EP0718506A1 Anchor bolt fastened by means of explosive charge |
| 06/26/1996 | EP0595966A4 A cable bolt |
| 06/25/1996 | CA2078845C Mine roof expansion anchor and bail member therefor |
| 06/19/1996 | CN2229517Y Expanding shell type metal anchoring-bolt fixed head |
| 06/19/1996 | CN2229516Y Metal anchoring bolt |
| 06/19/1996 | CN2229515Y End anchor type anchoring-bolt with recoverable bolt body |
| 06/18/1996 | US5526720 Wrench device for mine roof bolts |
| 06/11/1996 | US5525013 Cable bolt structure and related components |
| 05/30/1996 | DE4442483A1 Introduction of steel reinforcement rods into common concrete pipe |
| 05/29/1996 | CN2228132Y Double-wedge metal anchoring-bolt |
| 05/22/1996 | EP0578713B1 Articulated anchor bolt |
| 05/22/1996 | CN2227737Y Sleeve-pin type compound bamboo anchoring-bolt |
| 05/09/1996 | WO1996013651A1 Roof bolt |
| 05/08/1996 | EP0710320A1 A bearing plate assembly |
| 05/02/1996 | DE4438997A1 Gebirgsanker Rock bolts |
| 04/30/1996 | US5511909 Cable bolt and method of use in supporting a rock formation |
| 04/25/1996 | WO1996012089A1 Bail-type expanding shell rockbolt |
| 04/24/1996 | EP0611414B1 A friction rock stabilizer |
| 04/24/1996 | CN1121365A Integrated drilling and rock bolting apparatus |
| 04/18/1996 | EP0637676A4 Pliant bracing prop. |
| 04/10/1996 | CN2224282Y Flat-end snake-shaped resin anchor-rod |
| 03/28/1996 | DE19535024A1 Positioning method for reinforcement rod in wall |
| 03/26/1996 | US5501551 Mine roof expansion anchor, expansible shell element used therein and method of installation |
| 03/20/1996 | CN2222797Y Mining modified chlormagnesite boarding and ditch cover plate |
| 03/07/1996 | WO1996007016A1 Split-lock bar |
| 03/07/1996 | WO1996007015A1 A rock bolt and method of installing a rock bolt |
| 03/07/1996 | CA2197997A1 A rock bolt and method of installing a rock bolt |
| 03/06/1996 | EP0553309B1 Drilling pipe |
| 02/28/1996 | CN2221101Y Reclaiming anchoring bolt body |
| 01/31/1996 | EP0694113A1 Integrated drilling and rock bolting apparatus |
| 01/24/1996 | CN2218252Y Water expanding pipe drill rod |
| 01/18/1996 | DE19525610A1 Anchor plate for mounting on anchor rods or cables which are embedded in holes in ground |
| 01/04/1996 | DE4443131A1 Rock strata consolidating anchor, with solid or hollow core, and plastic outer casing |
| 01/03/1996 | EP0600007B1 Friction rock anchor |
| 01/03/1996 | CN2216590Y Anchoring-bolt |
| 12/14/1995 | WO1995033917A1 Washer for use in mining |
| 12/14/1995 | WO1995033916A1 Tubeformed rock bolt |
| 12/14/1995 | CA2192325A1 Washer for use in mining |
| 12/14/1995 | CA2191760A1 Tubeformed rock bolt |
| 12/08/1995 | CA2150431A1 Cable bolt and method of use in supporting a rock formation |
| 12/06/1995 | CN2214526Y Plastic expanding metal anchoring-bolt |
| 11/29/1995 | CN2213849Y Drilling type injecting anchor-bolt |
| 11/28/1995 | CA2011774C Mine roof support structure and method |
| 11/15/1995 | CN2212658Y Screw steel end type resin anchoring-bolt |
| 11/08/1995 | EP0680545A1 Means for anchoring a rock bolt made of concrete steel in a drill hole |
| 10/31/1995 | US5462391 Mine roof support cribbing system |
| 10/17/1995 | US5458442 Flexible roof bolt |