| Patents for E21C 25 - Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (2,629) |
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| 11/05/2008 | CN201144698Y Cutting head structure of mechanical boring machine |
| 10/29/2008 | CN201141304Y coal mining safety device with large inclination angle |
| 10/29/2008 | CN101297098A Cold-formed rotatable cutting tool and method of making the same |
| 10/23/2008 | US20080260509 Apparatus and Method for Moving a Mine Conveyor Segment |
| 10/23/2008 | US20080258535 Automotive construction machine |
| 10/22/2008 | CN201137496Y Tunnelling machine mounted geophysical drilling machine |
| 10/22/2008 | CN201137495Y Coal cutter cutting chain |
| 10/22/2008 | CN101289937A Cutting head structure of tunneling machine |
| 10/22/2008 | CN101289936A Hard rock tunneling machine |
| 10/16/2008 | US20080252133 Handle Assembly For A Concrete Saw |
| 10/16/2008 | DE102007007996B4 Antrieb für die Grabtrommel eines Tagebaugewinnungsgerätes Drive for the grave of a drum surface mining equipment |
| 10/15/2008 | CN201133247Y Tunnelling machine mounted double arm geophysical drilling machine |
| 10/15/2008 | CN100425800C Coal and rock cutting pick |
| 10/09/2008 | US20080246329 Retention System |
| 10/09/2008 | US20080246328 Automotive Machine for Producing Carriageways |
| 10/07/2008 | US7431402 Rock boring device |
| 10/02/2008 | US20080238181 Retention System |
| 09/24/2008 | EP1971752A2 Assist for raise lower mechanism for a concrete saw |
| 09/24/2008 | CN201121519Y Five-head blade tumbling cylinder of coal mining machine |
| 09/24/2008 | CN101270664A Walking type reversed loader |
| 09/24/2008 | CN101270663A Bestriding type reversed loader |
| 09/17/2008 | CN101266134A Cantilever driving frame head posture measuring systems and its method |
| 09/04/2008 | WO2008105915A2 Thick pointed superhard material |
| 09/03/2008 | CN201110176Y Roofbolter mechanism |
| 08/28/2008 | US20080205983 Slot cutting apparatus |
| 08/28/2008 | DE102007007996A1 Drive for production of organ of continuously operating open cast mining equipment designed as surface miner, has single motor drive and each of these drives is fed from central drive of open cast mining equipment over power supplies |
| 08/27/2008 | CN201106451Y Track-mounted liftable top-side construction drilling machine for anchor bar and anchor wire |
| 08/21/2008 | US20080197692 Locking fixture |
| 08/21/2008 | US20080197691 Locking fixture for a degradation assembly |
| 08/20/2008 | CN201103394Y Cutting device of development machine |
| 08/12/2008 | CA2456996C Cutting device for cutting trenches in the ground |
| 08/06/2008 | CN201095985Y Tunelling machine integrating wireless remote control, anchor rod device and inner-water-spraying system |
| 08/06/2008 | CN201095984Y Coal cutter |
| 08/06/2008 | CN101235717A Clear type loading device for coal mining tunneling machine |
| 07/31/2008 | WO2008089509A1 Rock sampling apparatus |
| 07/31/2008 | CA2676343A1 Rock sampling apparatus |
| 07/30/2008 | CN201092855Y Coal slack group-drill tapping machine |
| 07/30/2008 | CN201092854Y Grubbing anchoring protecting integrative grubbing anchor winch |
| 07/30/2008 | CN101230782A Lapping device between cantilevered development machine and post-matching leather belt reshipment machine |
| 07/30/2008 | CN101230781A Grubbing anchoring integrative grub-anchor winch |
| 07/23/2008 | CN201090229Y Engine-carried type supporting machine |
| 07/22/2008 | US7401861 Apparatus for removing surface coverings and methods for using such apparatus |
| 07/22/2008 | CA2357274C Highwall mining system |
| 07/17/2008 | US20080169698 Carbide Stem Press Fit into a Steel Body of A Pick |
| 07/16/2008 | CN101220744A Development machine with narrow main body |
| 07/16/2008 | CN100402795C Cutting tool and method of using same |
| 07/10/2008 | US20080164749 Overlapping Pedestals For Supporting A Block Secured To A Rotating Drum |
| 07/09/2008 | EP1941131A1 Cold-formed rotatable cutting tool and method of making the same |
| 07/02/2008 | CN201080825Y Tunneling machine belt transfer machine coal dropping point automatic rectification device |
| 07/02/2008 | CN201080824Y Thin coal bed cutter side arm type cutting means |
| 07/02/2008 | CN101210493A Large gradient roadheader |
| 06/25/2008 | CN201078230Y Digger of hydraulic pressure drive aggregating spider |
| 06/25/2008 | CN201078229Y Digger with hydraulic power oil easy to cool |
| 06/25/2008 | CN201078228Y Digger with hydraulic pressure support |
| 06/25/2008 | CN201078227Y Full hydraulically powered digger |
| 06/25/2008 | CN100396881C Auger flight support for plural auger coal mining systems |
| 06/19/2008 | US20080143168 Cutting bit with split wear ring and method of making same |
| 06/17/2008 | CA2356731C Highwall mining system |
| 06/11/2008 | CN201071907Y Tension device for scraper chain of development machine |
| 06/11/2008 | CN201071720Y Drum-type open continuous miner |
| 06/10/2008 | US7384104 Oscillating disc cutter with speed controlling bearings |
| 06/05/2008 | US20080129104 Impact Tool |
| 06/04/2008 | CN201068800Y Drag-flight conveyer |
| 06/04/2008 | CN201068799Y Tunnelling bolting combined machine |
| 06/04/2008 | CN201068798Y Down-hole coal mining equipment |
| 06/04/2008 | CN201068797Y Hard rock tunneller |
| 05/29/2008 | WO2008063977A2 Edge cutter assembly for use with a rotatable drum |
| 05/15/2008 | US20080111418 Edge cutter assembly for use with a rotatable drum |
| 05/08/2008 | US20080106139 Pick with an Interlocked Bolster |
| 05/07/2008 | CN201057046Y Support type lever manual coal digging machine |
| 05/07/2008 | CN201057045Y Multi-bit rock drill |
| 05/01/2008 | US20080100124 Tool with a Large Volume of a Superhard Material |
| 04/30/2008 | CN201053321Y Coal-excavating grooving machine suitable for excavating lump coal |
| 04/30/2008 | CN201053320Y Low coal seam hydraulic drag coal cutter |
| 04/30/2008 | CN101169036A Pedrail type lifting top slope anchor shaft anchor cable construction drilling machine and single-alley fast tunneling technique |
| 04/24/2008 | WO2008048901A1 Cuttings impoundment |
| 04/24/2008 | CA2666435A1 A method and system for cuttings disposal on a cuttings pad |
| 04/22/2008 | US7360844 Geosteering detectors for boring-type continuous miners |
| 04/17/2008 | WO2008045728A2 Rotatable cutting tool and cutting tool body |
| 04/17/2008 | US20080088172 Holder Assembly |
| 04/16/2008 | CN101161990A Method for realizing roof caving by using abrasive water jet |
| 04/16/2008 | CN101161989A Coal mine tunnel initating machine |
| 04/15/2008 | US7357458 Boring rig |
| 04/10/2008 | US20080084106 Rotatable cutting tool and cutting tool body |
| 04/09/2008 | EP1706585A4 Core breaker for an earth strata cutting assembly |
| 04/02/2008 | CN201043464Y Anti-sideslip back supporting |
| 04/02/2008 | CN101153540A Roadheader |
| 03/20/2008 | WO2008031524A1 Transportation of sulphur from solid sulphur deposits, in blocks of large dimensions |
| 03/20/2008 | CA2662880A1 Transportation of sulphur from solid sulphur deposits, in blocks of large dimensions |
| 03/19/2008 | CN201037421Y Large gradient development machine |
| 03/19/2008 | CN101144381A Very thin seam coal winning machine with particular arranged motor |
| 03/13/2008 | US20080061621 Flexible tubing for a rotary-percussion drilling device |
| 03/05/2008 | CN201031702Y Coal-charging device of mechanical boring machine |
| 03/05/2008 | CN201031700Y Digging anchor rod drill integral unit |
| 03/05/2008 | CN201031699Y Circular saw type mechanical boring machine |
| 03/05/2008 | CN201031698Y Inner transfer water combined circular saw blade |
| 03/05/2008 | CN201031697Y Coal mine down-hole continuously mining machine |
| 02/26/2008 | US7337037 Controlled wall saw and method for controlling the wall saw |
| 02/21/2008 | US20080042484 Cutting bit body and method for making the same |
| 02/20/2008 | CN201025034Y Coal integrated mining cutter |