| Patents for E21C 25 - Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (2,629) |
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| 11/14/1996 | WO1996035561A1 Road milling drum assembly and method of milling |
| 11/14/1996 | CA2220518A1 Road milling drum assembly and method of milling |
| 11/13/1996 | CN1135783A Highwall mining system |
| 11/05/1996 | US5570934 Traction boring device using multiple trepans for producing large cuts in concrete works and the like and method of producing cuts |
| 10/24/1996 | DE19505345C1 Cutting drum for underground coal mining |
| 09/25/1996 | CN2236018Y Burst-accident-proof drilling machine integrated with digger |
| 09/19/1996 | WO1996028631A1 Traction boring device using multiple trepans for producing large cuts in concrete works and the like and method of producing cuts |
| 09/11/1996 | EP0730507A1 Water stream and laser beam fracturing apparatus |
| 09/11/1996 | CN2235017Y Inner casing cutting machine |
| 09/11/1996 | CN1130931A Highwall mining system |
| 09/10/1996 | US5553926 Apparatus for mining mineral from a seam |
| 08/29/1996 | DE19527407C1 Continuous mining machine from seam |
| 08/22/1996 | DE19504779A1 Process for extraction of raw material in seams, esp. coal |
| 07/16/1996 | US5536073 Road milling drum assembly and method of milling |
| 05/30/1996 | WO1996016249A1 Apparatus and method for cutting arched opening |
| 04/18/1996 | EP0730507A4 Water stream and laser beam fracturing apparatus |
| 02/21/1996 | EP0697049A1 Detachable link for an endless cutting or kerfing chain |
| 02/21/1996 | CN2220529Y Automatic energy oil extraction power machine -II type |
| 01/17/1996 | EP0692612A2 Method for drilling with a drilling tool having an eccentrical mounted shaft |
| 12/26/1995 | US5478139 Mobile digging/cutting system |
| 12/21/1995 | DE4440424C1 Method of supporting saw notches during production of stone blocks |
| 12/12/1995 | US5474365 Apparatus for mining a seam, in particular of coal |
| 12/05/1995 | US5472262 Double slot wire sawing apparatus and method |
| 11/09/1995 | WO1995030067A1 A highwall mining system with mining and removal of coal (or ore) |
| 11/09/1995 | DE4416005A1 Step frame machine for mining seam of coal |
| 08/17/1995 | DE4440498A1 Machinery for controlled cutting of arched wall faces |
| 07/26/1995 | EP0663983A1 Auger mining machine. |
| 07/25/1995 | US5435628 Underground hydraulic mining method and apparatus |
| 06/14/1995 | EP0656988A1 Apparatus for cutting and excavating solids |
| 05/18/1995 | DE4338653A1 Drill carriage for underground application |
| 05/02/1995 | US5411432 Programmable oscillating liquid jet cutting system |
| 03/21/1995 | CA1334842C Systems to drill minerals etc... |
| 03/09/1995 | DE4329549A1 Machine system for winning minerals deposited as a stratum, especially coal |
| 02/28/1995 | US5392870 Mineral cutter tooling system |
| 01/26/1995 | WO1995002747A1 Highwall mining system |
| 01/26/1995 | WO1995002746A1 Highwall mining system |
| 01/17/1995 | US5382114 Tunnel excavation apparatus |
| 01/10/1995 | US5380068 Deep kerfing in rocks with ultrahigh-pressure fan jets |
| 01/05/1995 | WO1995000743A1 Method of mining |
| 01/03/1995 | US5378049 Rotary cutter for extracting hard rock |
| 12/15/1994 | DE4319512A1 Apparatus for parting and conveying mineral raw materials occurring in seams, in particular coal |
| 11/24/1994 | WO1994026987A1 Detachable link for an endless cutting or kerfing chain |
| 11/16/1994 | CN1095009A Finger type vibratory cutting machine |
| 11/10/1994 | WO1994025733A1 Double slot wire saw mining method and apparatus |
| 11/10/1994 | CA2138973A1 Double slot selective mining system |
| 10/18/1994 | US5356081 Apparatus and process for employing synergistic destructive powers of a water stream and a laser beam |
| 10/06/1994 | DE4310251A1 Gleitlagerung eines Räumschildhalters eines Walzenladers Plain bearing a Räumschildhalters a shearer |
| 09/01/1994 | WO1994019140A1 Water stream and laser beam fracturing apparatus |
| 09/01/1994 | CA2153985A1 Water stream and laser beam fracturing apparatus |
| 08/25/1994 | DE4306333A1 Method and apparatus for producing stable trenches in the earth, loose rock or the like on the basis of hydraulic extraction |
| 08/16/1994 | US5338104 Auxiliary cutter for a mining machine having coaxial cutter drums |
| 08/16/1994 | US5338102 Method of mining |
| 07/27/1994 | CN1090010A Auto-tapping two-way cutting force moment self-equilibrating excavation drill and method thereof |
| 07/26/1994 | US5332293 Apparatus for cutting erosive materials using high pressure water device |
| 07/19/1994 | US5330257 Auger mining machine |
| 07/07/1994 | WO1994015072A1 Process for inerting a coal mining site |
| 06/05/1994 | CA2110636A1 Mineral cutter tooling system |
| 05/18/1994 | CN1086873A Apparatus for cutting and excavating solids |
| 04/28/1994 | WO1994009256A1 Auger mining machine |
| 04/28/1994 | CA2147004A1 Auger mining machine |
| 03/31/1994 | WO1994007001A1 Programmable oscillating liquid jet cutting system |
| 03/29/1994 | US5297639 Method of erosively working a hard object |
| 03/23/1994 | EP0587991A2 Pickholder for shears drum or cutting head |
| 03/22/1994 | US5295735 Rock saw |
| 03/16/1994 | CN2158916Y Drum of coal-dislodging machine |
| 03/03/1994 | WO1994004791A1 Apparatus for cutting and excavating solids |
| 03/03/1994 | CA2142106A1 Apparatus for cutting and excavating solids |
| 02/24/1994 | DE4227584A1 Cutter-head for rock- or coal-mining - has plungers in circle in blind holes connected to coolant supply forming seal between stationary and rotary halves |
| 02/22/1994 | CA1327196C Rotary cutting tool |
| 01/19/1994 | CN2153635Y Changeable angle and position pick cutting drum for coal winning machine |
| 12/28/1993 | US5273344 Process for inerting a coal mining site |
| 12/23/1993 | DE4219877A1 Mining cutter vehicle - is equipped with jacks and stabilising outriggers enabling raised chassis to traverse from side to side |
| 11/25/1993 | DE4237896C1 Equipment for loosening and conveying coal - works in seam with conveyor belt, recovery belt and circulating chain conveyor driven by chain wheel |
| 09/28/1993 | US5248188 Chain for trencher apparatus |
| 09/22/1993 | CN2142496Y Explosion-proof mine channelling machine |
| 09/01/1993 | EP0557805A1 Tunnel excavation apparatus |
| 07/27/1993 | US5230548 Longwall cutter drum having reduced production of dust |
| 07/22/1993 | WO1993014296A1 Equipment for clearing rock and other surfaces of stone and other material by means of water jets under high pressure |
| 04/28/1993 | EP0368887B1 Selectively phased water supply of a cutter head |
| 04/28/1993 | CN2130918Y Drillhole guide slitting machine |
| 04/08/1993 | DE4229015A1 Striker, milling, drilling roller for surface levelling of rock, ore and the like - is eccentrically activated, balanced, self-rotating or remotely driven. |
| 04/07/1993 | EP0535329A2 Method and device for machining by means of multiple jets |
| 04/07/1993 | CN2129340Y Saw-tooth tunneller |
| 02/28/1993 | CA2076217A1 Method of and an apparatus for material-removing working by means of multiple jets |
| 02/18/1993 | DE4226324A1 Verfahren und einrichtung zum abbau eines untertage-vorkommens Method and device for decomposing an underground-occurrence |
| 02/04/1993 | DE4125512A1 Machine for loosening and conveying coal from seam - has basic profiled component so formed that it is securely latched when pulled around by endless chain |
| 01/26/1993 | US5181766 System for cutting and conveying coal and the like |
| 01/21/1993 | WO1993001392A1 Rotary cutter for extracting hard rock |
| 12/24/1992 | DE4125104C1 Coal winning machine with conveyor - has steel components including guide rail with hook-shaped cross=section with broad head |
| 12/15/1992 | CA1311505C Selectively phased water supply of a cutter head |
| 12/10/1992 | WO1992021853A1 Hole indexing device for rock drilling |
| 12/10/1992 | WO1992021852A1 Method and drilling apparatus for line drilling |
| 09/23/1992 | CN2116777U Connecting plate for rotor concrete jet machine |
| 09/17/1992 | WO1992014035A3 Auxiliary cutter for a mining machine with coaxial cutting drums |
| 09/02/1992 | CA2062077A1 Selective mining method and apparatus |
| 09/01/1992 | US5143423 Drum assembly for a continuous miner |
| 08/20/1992 | WO1992014035A2 Auxiliary cutter for a mining machine with coaxial cutting drums |
| 08/19/1992 | CN2113341U Rocker arm supporting spherical joint shaft sleeve for coal machine |
| 08/12/1992 | EP0482019A4 Method and apparatus for cutting erosive materials using high pressure water means |
| 07/22/1992 | CN1017507B Apparatus for cutting, drilling or similar machining stone. ores or similars |