| Patents for E21C 25 - Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (2,629) |
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| 02/20/2008 | CN201025033Y Small-diameter cutter for light and small excavator |
| 02/20/2008 | CN201025032Y Light and small excavator vibration reduction device |
| 02/20/2008 | CN201025031Y Short and small light excavator |
| 02/14/2008 | US20080036283 Attack Tool |
| 02/14/2008 | US20080036282 Attack Tool |
| 02/14/2008 | US20080036281 Hollow Pick Shank |
| 02/14/2008 | US20080036279 Holder for a degradation assembly |
| 02/14/2008 | US20080036278 Attack tool |
| 02/14/2008 | US20080036277 Pick Shank in Axial Tension |
| 02/14/2008 | US20080036275 Retainer Sleeve in a Degradation Assembly |
| 02/14/2008 | US20080036274 Sleeve in a Degradation Assembly |
| 02/14/2008 | US20080036273 Washer for a Degradation Assembly |
| 02/14/2008 | US20080036272 Washer for a degradation assembly |
| 02/14/2008 | US20080036271 Method for Providing a Degradation Drum |
| 02/14/2008 | US20080036270 Pick with a Bearing |
| 02/14/2008 | US20080036269 Hollow Pick Shank |
| 02/13/2008 | CN201021499Y Dynamic arm hole digger |
| 02/07/2008 | US20080030066 Rotary cutting bit with material-deflecting ledge |
| 02/05/2008 | US7325882 Rock cutting machine |
| 01/31/2008 | US20080024001 Cutter head for an excavator machine |
| 01/30/2008 | CN201013374Y Tunneling machine cutting portion constant-power hydraulic system |
| 01/30/2008 | CN201013372Y Sprocket saw |
| 01/30/2008 | CN201013371Y Block-stopping extraction horizontal groove cutting machine |
| 01/30/2008 | CN201013370Y Tunnelling machine cutting feeding automatic control system |
| 01/23/2008 | EP1706579B1 Holding wrench for rock drilling machine and rock drilling machine including such a holding wrench |
| 01/23/2008 | CN201011302Y Coal mining machine |
| 01/23/2008 | CN101111662A Device for milling rock and other materials and method for milling rock or the like using said device |
| 01/23/2008 | CN101109446A Sealing device of disk shaped knife |
| 01/23/2008 | CN100363591C Unmanned down-hole coal excavating method for vertical shaft group |
| 01/15/2008 | US7318364 Shingle removing machine |
| 01/09/2008 | CN201003401Y Articulate folding and rotary cutting arm type cantalever tunnelling machine |
| 01/09/2008 | CN201003400Y Cantilevered type coal roadway driller |
| 01/09/2008 | CN201002330Y Injection moulding heating device for diamond rope saw |
| 01/09/2008 | CN101100941A Down-hole coal excavation apparatus |
| 01/02/2008 | CN200999612Y Split combination type kerving machine |
| 12/27/2007 | WO2007120059B1 Cutting, drilling or grinding apparatus and method |
| 12/25/2007 | US7310897 Bit holder for a ploughing bit and ploughing bit |
| 12/20/2007 | US20070290547 Superhard Composite Material Bonded to a Steel Body |
| 12/20/2007 | US20070290546 A Wear Resistant Tool |
| 12/20/2007 | US20070290545 An Attack Tool for Degrading Materials |
| 12/19/2007 | CN200993014Y Small-sized rock drift fast impact drilling-loading machine |
| 12/19/2007 | CN200993013Y Small-sized multifunctional excavator |
| 12/19/2007 | CN200993012Y Self-sliding light-small excavator |
| 12/12/2007 | CN200989207Y Tunneller random protection system |
| 12/12/2007 | CN101086207A External tunneling machine cutting part cutting head for sealing water |
| 12/12/2007 | CN101086205A Tunneling, anchoring and drilling composite machine |
| 12/06/2007 | US20070278843 Surface conditioning attachment |
| 12/05/2007 | CN200985792Y Walking multifunctional scraper bucket loading grab |
| 12/05/2007 | CN101082278A Scraper conveyer |
| 11/29/2007 | US20070273196 Method and apparatus for utilizing the full capacity of a particular type of mine hoist for excavating deep shafts |
| 11/28/2007 | CN200982195Y Small-sized cantilevered tunneller for coal roadway |
| 11/27/2007 | US7300651 Methods of delaying development of CEA-associated tumors using anti-idiotype antibody 3H1 |
| 11/27/2007 | CA2471335C A mining or tunnelling device |
| 11/22/2007 | WO2007133556A2 Systems and methods for wound area management |
| 11/21/2007 | CN101074604A Multi-bit rock driller |
| 11/14/2007 | CN200975255Y Full hydraulic split crawler-type coal cutter |
| 11/14/2007 | CN101070761A Digging-protecting integrated digging-protecting machine |
| 11/14/2007 | CN101070758A Digging-drilling integrated digging-drilling machine |
| 11/08/2007 | US20070257545 Cutting tool and method of assembling the cutting tool |
| 11/08/2007 | US20070257544 Cutting tool |
| 11/08/2007 | US20070257543 Vertical Milling Apparatus for a Paved Surface |
| 11/06/2007 | CA2343912C Mining machine and mining method |
| 10/31/2007 | CN200968215Y Cantilevered digging machine |
| 10/25/2007 | WO2007120059A1 Cutting, drilling or grinding apparatus and method |
| 10/24/2007 | CN200964860Y Dredging anchoring integral machine |
| 10/24/2007 | CN200964859Y Tunneling, anchoring and drilling composite machine |
| 10/24/2007 | CN200964858Y Dredging, protection, anchoring integral tunneling apparatus |
| 10/24/2007 | CN200964857Y Narrow frame tunneling machine |
| 10/17/2007 | CN101054899A Coal-excavating grooving machine suitable for excavating lump coal |
| 10/16/2007 | CA2415198C A coal and rock cutting pick |
| 10/10/2007 | EP1841949A1 Device for milling rock and other materials and method or milling rock or the like using said device |
| 10/10/2007 | CN101050703A Underground continuous tunnelling machine |
| 10/04/2007 | US20070228805 Power driven hammer |
| 10/03/2007 | CN200955392Y Lane digger |
| 10/03/2007 | CN200955391Y Small energy-saving impaction type coal-production machine |
| 10/03/2007 | CN101046152A Integrated tunnelling and anchoring machine |
| 10/03/2007 | CN101046151A Integrated tunnelling and anchoring machine |
| 09/27/2007 | WO2007106928A1 Swivel-head continuous miner |
| 09/27/2007 | US20070222274 Floor covering removal machine |
| 09/19/2007 | CN101037943A Light and small-sized mechanical boring machine minor diameter cutting head |
| 09/19/2007 | CN101037942A Small light mechanical boring machine |
| 09/12/2007 | EP1618258B1 Method for pneumatically picking up soil for use in suction devices and suction tube for this purpose and use of said suction tube |
| 09/12/2007 | CN200946511Y Thin coal layer coal cutter with specially-arranged motor |
| 09/12/2007 | CN200946510Y Rocking arm with longitudinally-disposed cutting motor |
| 09/12/2007 | CN200946508Y Electric traction coal cutter for thin coal layer |
| 09/12/2007 | CN101033688A Cantilevered tunnelling road-header |
| 09/11/2007 | CA2426258C An apparatus for retrieving metal debris from a well bore |
| 09/06/2007 | US20070205652 Rotatable Cutting Tool |
| 09/05/2007 | CN200943497Y Coal-winning machine adopting hub motor |
| 08/28/2007 | CA2358828C Rock boring device |
| 08/28/2007 | CA2268146C A device and a method for moving an object |
| 08/22/2007 | CN101021150A Driving head for entry-driving machine |
| 08/16/2007 | WO2006079536A8 Device for milling rock and other materials and method or milling rock or the like using said device |
| 08/15/2007 | CN2934784Y Spraying, liquid inlet and sealing device in tunneling machine |
| 08/15/2007 | CN2934571Y Water pressure rock-breaking machine |
| 08/15/2007 | CN101016838A Double-blades double-cylinders drum of coal mining machine |
| 08/09/2007 | US20070182239 Rotary cutting bit with material-deflecting ledge |
| 08/08/2007 | CN2931786Y Tunnel digging machine |
| 08/08/2007 | CN101011853A Injection moulding heating method for diamond rope saw and apparatus |
| 08/01/2007 | CN2929185Y Bridge type belt transfer machine |