| Patents for E21D 21 - Anchoring-bolts for roof, floor, or shaft-lining protection (4,377) |
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| 10/05/1995 | WO1995026457A1 Rock bolt |
| 10/05/1995 | DE4411643A1 Method of dismantling free part of tensioned member of prestressed anchor on bore-hole end of loaded anchoring body |
| 10/05/1995 | CA2184586A1 Rock bolt |
| 10/04/1995 | CN2209213Y Double expansion sleeve type anchoring-bolt |
| 09/28/1995 | DE4408043A1 Clamping force monitoring device for clamp element |
| 09/27/1995 | CN2208617Y Double-end anchored type anchor rod |
| 09/20/1995 | CN2208100Y Expanded plastic-steel pin |
| 09/13/1995 | CN2207445Y Plastic anchored tube anchoring-bolt |
| 09/13/1995 | CN1108331A A rock anchor assembly |
| 09/06/1995 | EP0442935B1 Improved rock anchor and method of manufacture |
| 09/06/1995 | CN2206839Y Plastic stretchable anchor rod |
| 08/31/1995 | WO1995023277A1 High tensile strand, anchorages and methods of installation thereof |
| 08/29/1995 | US5445477 Bearing plate with a continuous elliptical embossment |
| 08/22/1995 | US5443332 Rockbolt tensioning |
| 08/22/1995 | US5443331 Threaded bar construction |
| 08/15/1995 | US5441372 Rock bolt shell and cone |
| 08/08/1995 | CA2002806F Rock anchor and method of manufacture |
| 08/02/1995 | CN1106096A Pipe anchor rod technology and its anchor rod |
| 08/01/1995 | US5437830 Process of making a rod for use in reinforcing an underground rock formation |
| 08/01/1995 | US5437526 Arrangement for anchoring a rod-shaped tension member of composite fiber material |
| 07/26/1995 | CN2204002Y Multi-wedge type bamboo anchoring-bolts |
| 07/25/1995 | CA2076423C Nut with deformed internal thread, and method of using same in bolt assembly |
| 07/20/1995 | WO1995019491A1 Tensionable gfp rock anchor |
| 07/19/1995 | EP0628114A4 Cable bolt. |
| 07/19/1995 | CN1105410A Rock anchor bolt |
| 07/18/1995 | US5433558 Self-tapping, and self-tapping and self-drilling, rock bolts |
| 07/13/1995 | DE4400644A1 Verspannbarer GfK-Gebirgsanker Braceable GfK rock bolts |
| 07/12/1995 | EP0662018A1 Hollow bars and method of manufacture |
| 07/05/1995 | CN2202799Y Reinforced glass fiber anchor rod |
| 06/28/1995 | EP0659976A2 A rock anchor assembly |
| 06/28/1995 | EP0659231A1 Rockbolt |
| 06/24/1995 | CA2138940A1 Rock anchor assembly |
| 06/14/1995 | CN2200694Y Full structure forced plastic anchor rock |
| 06/14/1995 | CN1103701A Bridge span erecting machine |
| 05/30/1995 | US5419660 Bending and feeding apparatus for installing a cable into a preformed bore |
| 05/24/1995 | CN2198388Y Expanding pre-stress anchor cable |
| 05/23/1995 | US5417521 Multiple cable rock anchor system |
| 05/23/1995 | US5417520 Nut with deformed internal thread, and method of using same in bolt assembly |
| 05/18/1995 | WO1995013453A1 Injection cable bolt |
| 05/18/1995 | CA2176351A1 Injection cable bolt |
| 05/11/1995 | CA2135354A1 Device for lifting and alignment of nets in rock reinforcement |
| 05/10/1995 | CN2196689Y Combined-annualation skew-shoulder steel belt and anchor-bolt combination supporting device |
| 05/03/1995 | CN2196179Y Plastic bamboo anchor rod |
| 04/27/1995 | DE4336488A1 Composite anchor |
| 04/09/1995 | CA2108088A1 Rock bolt load sensor |
| 03/30/1995 | WO1995008695A1 Anchor bolt for stabilising rock strata |
| 03/30/1995 | DE4332654A1 Rock anchor with limited yielding capacity |
| 03/30/1995 | CA2149871A1 Anchor bolt for stabilising rock strata |
| 03/01/1995 | CA2130843A1 Rock anchor bolt |
| 02/28/1995 | US5392654 Rock bolt load sensor |
| 02/23/1995 | WO1995005526A1 Ribbed flexible member for casting into an anchorage medium |
| 02/23/1995 | WO1995005525A1 A rock bolt |
| 02/23/1995 | WO1995005524A1 Multiple cable rock anchor system |
| 02/15/1995 | CN2189644Y Clip-hoop type bamboo anchor rod |
| 02/08/1995 | EP0637676A1 Pliant bracing prop |
| 02/07/1995 | US5387060 For supporting rock within a mine |
| 02/02/1995 | WO1995003477A1 A bearing plate assembly |
| 02/02/1995 | CA2168111A1 A bearing plate assembly |
| 02/01/1995 | CN2188653Y Expansion prestressed anchoring-bolt |
| 02/01/1995 | CN2188652Y Anchoring-bolt |
| 01/31/1995 | US5385433 Bearing plate |
| 01/31/1995 | CA2128990A1 Friction rock stabilizers |
| 01/31/1995 | CA2128989A1 Friction rock stabilizers |
| 01/17/1995 | US5381690 Method and apparatus for measuring three dimensional stress in rock surrounding a borehole |
| 01/05/1995 | WO1995000744A1 Improvements in rock bolts |
| 01/05/1995 | CA2142894A1 Improvements in rock bolts |
| 01/03/1995 | US5378087 Mine roof support apparatus and method |
| 12/27/1994 | US5375946 Mine roof support apparatus and method |
| 12/27/1994 | CA1333652C Method of forming a screw thread and tubular body with a screw thread |
| 12/21/1994 | CN2185796Y Cross compromise anchoring-bolt |
| 12/20/1994 | US5374140 Drillable ground support bolt |
| 12/14/1994 | EP0628114A1 Cable bolt |
| 12/14/1994 | CN2185325Y Self-drilling slurry filling type anchoring-bolt system |
| 12/13/1994 | CA2047013C Cable grip |
| 11/24/1994 | WO1994017262A3 Pliant bracing prop |
| 11/17/1994 | DE4314594A1 Bonding anchor |
| 11/08/1994 | CA1332874C Mine roof expansion anchor |
| 10/27/1994 | WO1994024404A1 Integrated drilling and rock bolting apparatus |
| 10/27/1994 | CA2160379A1 Integrated drilling and rock bolting apparatus |
| 10/12/1994 | CN2179462Y Anchor-drawing support |
| 10/12/1994 | CN2179461Y Cement roll anchoring detatchable anchoring-bolt |
| 10/04/1994 | US5352066 Mine roof/bolt anchor assembly and method of installation thereof |
| 10/04/1994 | US5352065 Rock bolting |
| 09/28/1994 | CN2178281Y Inverted wedge fixing type minor diameter anchoring bolt |
| 09/27/1994 | US5350024 Drill pipe |
| 09/15/1994 | CA2114901A1 Anchor bolt |
| 09/08/1994 | DE4304606A1 Bundled anchor |
| 09/07/1994 | CN2176432Y String-assembling and shell-expanding roofbolt |
| 09/07/1994 | CN2176431Y Cable roofbolt |
| 09/06/1994 | US5344257 Mine roof expansion anchor and bail element |
| 09/06/1994 | US5344256 Rock anchor and method of manufacture |
| 08/31/1994 | EP0612607A1 Tensile body with a formed profile as well as method for fabricating the same |
| 08/31/1994 | CN2175829Y Expasion sleeve bolt |
| 08/30/1994 | CA1331705C Rock anchor |
| 08/17/1994 | CN2174566Y Anchoring-bolt with steel wire rope structure |
| 08/09/1994 | US5335736 Rock bolt system and method of rock bolting |
| 08/04/1994 | WO1994017283A1 Means for anchoring a rock bolt made of concrete steel in a drill hole |
| 08/03/1994 | EP0524226B1 Injection bore anchor with conveyor screw |
| 07/27/1994 | WO1994017262A2 Pliant bracing prop |
| 07/27/1994 | CN2172808Y Bamboo anchoring-bolt |