| Patents for E21D 21 - Anchoring-bolts for roof, floor, or shaft-lining protection (4,377) |
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| 02/04/2009 | CN101358531A Front anchor and post pier type extruding sealing grouting bolt |
| 01/28/2009 | CN201187308Y Large inclination angle thick coal seam support with stump along empty digging lane |
| 01/28/2009 | CN201187057Y New type anchoring bolt spare and accessory parts |
| 01/27/2009 | CA2583519C Method and system for mining hydrocarbon-containing materials |
| 01/22/2009 | US20090022544 Cable Coupler Having Retained Wedges |
| 01/21/2009 | CN201183950Y Self-propelling type anchor rod of seamless steel pipe |
| 01/21/2009 | CN101349155A Apparatus for controlling laneway bottom heave |
| 01/21/2009 | CN100453743C Prestress anchor device |
| 01/15/2009 | WO2009006692A1 A mesh system |
| 01/15/2009 | CA2692950A1 A mesh system |
| 01/14/2009 | CN201180553Y Slip casting anchor bar |
| 01/14/2009 | CN201180552Y Anchor bar suspension device of front cantilever |
| 01/14/2009 | CN201180551Y Anchor bar suspension device of front cantilever |
| 01/14/2009 | CN101346517A Friction bolt and expansion adaptor for said anchor |
| 01/07/2009 | CN101338683A Gradual spanning top-down bridge construction method |
| 01/07/2009 | CN101338679A Deep well great section loose wall rock laneway support method |
| 01/01/2009 | US20090003940 System And Method For Mine Roof Counter Bore And Cable Bolt Head Securement Therein |
| 12/31/2008 | EP2009228A2 Packer with integral mixer |
| 12/31/2008 | CN201172823Y Exhausting multiplex anti-corrosive anchor rod |
| 12/31/2008 | CN101333813A U-shaped anchorage cable |
| 12/24/2008 | WO2008154683A1 Rock bolt tendon tensioning |
| 12/24/2008 | WO2008154669A1 Method and device for drilling a hole in ground or rock material and forming a brace |
| 12/24/2008 | CN201170106Y Laneway anchor rod support system |
| 12/24/2008 | CN201170105Y Strange wall integral anchor pouring anchor rod |
| 12/24/2008 | CN201170104Y Top board support component in fully mechanized caving face ending |
| 12/24/2008 | CN201169770Y Surface screw thread metal rod body for anchoring |
| 12/24/2008 | CA2691198A1 Method and device for drilling a hole in ground or rock material and forming a brace |
| 12/18/2008 | DE102007028267A1 Verbesserte Ankermutter aus faserverstärktem Kunststoff Improved anchor nut fiber reinforced plastic |
| 12/17/2008 | EP1623095B1 Expandable rock bolt and rock bolting system |
| 12/16/2008 | US7465128 Anchor device with an elastic expansion sleeve |
| 12/10/2008 | EP1885997B1 Method and device for drilling, particularly percussion or rotary percussion drilling, a hole in soil or rock material |
| 12/10/2008 | CN201162538Y Steel chord type force-measuring anchor stock |
| 12/10/2008 | CN201162536Y Tunnel steel arch frame lock foot anchoring stock net-spraying composite structure |
| 12/10/2008 | CN201162216Y Anti-back overflow combination type anchor bar |
| 12/10/2008 | CN201161878Y Movable tower crane face operation construction apparatus |
| 12/04/2008 | US20080298904 Mine roof cable bolt, coupler and method |
| 12/03/2008 | CN201159086Y Full-thread combination type anchor bar |
| 12/03/2008 | CN201159085Y Non-longitudinal rod deformed steel bar type resin anchor bar metal rod body |
| 12/03/2008 | CN201158820Y Full threaded mortar anchor bar |
| 12/03/2008 | CN201158819Y Self-propelling anchoring-rob capable of exhaustion |
| 12/03/2008 | CN201158818Y Anti-corrosion anchor bar with centering slurry guiding tube |
| 11/27/2008 | DE102007000283A1 Expansion bolt has anchor bolt and expansion sleeve and anchor bolt has shank and cleaning element made up of fibrous material is provided in end area of free end of shank |
| 11/26/2008 | EP1994253A1 Tube protection with plugged tube cladding |
| 11/26/2008 | CN201155333Y Direction-changing anchorage cable |
| 11/25/2008 | CA2458701C Concrete anchor |
| 11/20/2008 | DE102007000277A1 Selbstbohrender Gebirgsanker A self-rock bolts |
| 11/20/2008 | DE10017763B4 Gebirgsanker Rock bolts |
| 11/20/2008 | DE10017751B4 Gebirgsanker Rock bolts |
| 11/20/2008 | DE10017750B4 Gebirgsanker Rock bolts |
| 11/19/2008 | EP1992782A2 Self-drilling mountain anchor |
| 11/19/2008 | CN101307694A Self-drilling rock anchor |
| 11/13/2008 | WO2008134798A1 Energy absorbing rock bolt accessory, rock bolt assembly, and method of installing a rock bolt |
| 11/12/2008 | CN101305161A Self drilling rock bolt |
| 11/12/2008 | CN101302937A Girders anchorage cable arcuated connection locking device |
| 11/05/2008 | EP1987230A1 Injection bolt with a fixed static mixer |
| 11/04/2008 | US7445406 Rock bolt |
| 10/30/2008 | WO2008130415A1 Mine roof bolt with resin control surface |
| 10/30/2008 | WO2008128301A1 Reinforcing of formations |
| 10/30/2008 | WO2008128269A1 Pipe coupling |
| 10/30/2008 | WO2008128268A1 Device for producing a drill hole in rock material |
| 10/30/2008 | WO2008128266A1 Device for producing a drill hole in rock material |
| 10/30/2008 | CA2682804A1 Mine roof bolt with resin control surface |
| 10/29/2008 | CN101294497A PET plastic anchor rod body and manufacturing method thereof |
| 10/23/2008 | WO2008124885A1 Plastic rock-bolt or dowel and method of manufacture of the same |
| 10/23/2008 | WO2007123668A3 Roof bolt plate |
| 10/23/2008 | US20080260472 Resin Groutable Expansion Anchor and Method of Installing Same |
| 10/22/2008 | CN201137143Y Breaking-resistant prestressed anchor rod tray |
| 10/22/2008 | CN201137141Y Hollow grouting anchoring-bolt capable of measuring length and discharging gas |
| 10/16/2008 | WO2008122086A1 Extendable member |
| 10/15/2008 | EP1980712A1 Load cell for ground anchors |
| 10/15/2008 | CN101285392A Anchor rod prestress controlled self-locking lockset |
| 10/15/2008 | CN101285385A Undermining method for three-dimensional pipe-roof |
| 10/15/2008 | CN100425779C Threaded deformed bar and method for making the bar |
| 10/08/2008 | CN101280686A Improved cable bolt |
| 10/08/2008 | CN101280684A Goaf surrounding rock around gob-side supporting method under three soft geological condition |
| 10/02/2008 | US20080240866 Automated, low profile drilling/bolting module with collaring |
| 10/02/2008 | US20080240865 Automated, low profile drilling/bolting module with gripper |
| 10/02/2008 | DE102007015259A1 Reibrohranker mit Patronenkleber Friction Bolts with adhesive cartridges |
| 10/01/2008 | EP1974124A1 Fluid recovery |
| 10/01/2008 | CN201125742Y Expansion sheath type anchor rod |
| 10/01/2008 | CN201125671Y Anchor bolt recovering device |
| 10/01/2008 | CN100422448C Anti-corrosion rockbolt with sack body |
| 09/30/2008 | US7428937 Automated, low profile drilling/bolting module with gripper |
| 09/24/2008 | EP1971753A1 Corrosion protection for anchors in rock |
| 09/24/2008 | CN201121522Y Barrel type anchor bar of extrusion-injection anchor |
| 09/24/2008 | CN201121521Y Opposite pull anchor wire |
| 09/17/2008 | CN101265806A Large obliquity thick coal seam small coal pillar goaf-along lane driving side support device |
| 09/12/2008 | WO2008106737A1 Rock bolt and its fabrication and installation |
| 09/11/2008 | US20080219775 Bolt assembly |
| 09/10/2008 | CN101260672A Weak surface rock slope grouting method and anchor tube for grouting |
| 09/09/2008 | CA2605208A1 Bolt assembly |
| 09/03/2008 | CN201110183Y Steel stranded wire anchor rod |
| 09/03/2008 | CN101258301A One-piece drill bit for single-pass anchor bolting and single pass drilling apparatus |
| 08/27/2008 | CN101251021A Tensioning assembly for a cable bolt |
| 08/27/2008 | CN101250876A Method for installation of medicine volume anchor bar anchorage agent |
| 08/27/2008 | CN101250875A Pawl type self-locking anchor bar, chorda |
| 08/20/2008 | CN201103397Y Yielding deformed steel bar slip-casting anchor bar |
| 08/20/2008 | CN201103396Y Anti-tearing steel strip for eyelet |
| 08/20/2008 | CN100412317C Square modelling ceiling boards and ribbed floor |
| 08/13/2008 | CN201100131Y A fiber enhanced full long anchor fixing pole |