| Patents for B28D 1 - Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhere; Machines, devices, tools therefor (14,003) |
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| 11/28/1991 | WO1991017964A1 Pair of pincers |
| 11/28/1991 | DE4016946A1 Large sintered ceramic component mfg. - by breaking sintered body into segments at most fragile zones by thermal shock to be reassembled with mechanical bonding |
| 11/28/1991 | DE4016310A1 Beisszange Beisszange |
| 11/27/1991 | EP0457927A1 Frame saw tensioning device for stone working having a protective cover for the sealing bellows of the tensioning piston |
| 11/27/1991 | EP0328610B1 Process for cropping bars of hard materials and equipment for carrying out the process |
| 11/27/1991 | CN2089397U Elbow joint type marble cutting machine |
| 11/27/1991 | CN1056458A Knife for working big-diameter thin diamond wall |
| 11/26/1991 | US5067969 Cutter and manufacturing method therefor |
| 11/26/1991 | US5067826 Ball and roller bearings and bearing components |
| 11/26/1991 | CA1292407C Wire drive apparatus for wire saw |
| 11/21/1991 | EP0457533A2 A wafer slicing and grinding system |
| 11/21/1991 | EP0456692A1 Cutting apparatus. |
| 11/19/1991 | US5066070 Apparatus for reflex-percussive cutting of concrete etc. |
| 11/14/1991 | WO1991017033A2 Apparatus and method for cutting unhardened concrete |
| 11/13/1991 | EP0456223A1 A slicing machine and a slicing method by the same |
| 11/13/1991 | EP0455994A2 Eccentric drive for radially oscillating rollers, rolling cutters and milling drilling tools |
| 11/13/1991 | CN2088472U Dimond band saw blade for cutting stone material |
| 11/06/1991 | EP0454950A2 Device for making holes with intercutting |
| 11/05/1991 | US5062913 Laminated tile product and method for producing the same |
| 11/05/1991 | US5062865 Chemically bonded superabrasive grit |
| 10/30/1991 | EP0454626A2 Means for easy trimming plane floor covering elements with irregular shape |
| 10/29/1991 | US5060628 Guide pulley base for wire saw |
| 10/24/1991 | CA2035072A1 Cutting chain for aggregate materials |
| 10/23/1991 | EP0453322A1 Cutting chain for aggregate material |
| 10/23/1991 | EP0452618A1 Process and apparatus for preparing an abrasive body for grinding tools |
| 10/23/1991 | CN2087126U Marble plate milling machine |
| 10/21/1991 | WO1991016184A2 Measuring and cutting apparatus |
| 10/17/1991 | WO1991015346A1 Installation for conditioning concrete blocks |
| 10/16/1991 | EP0452255A2 Stone drill bit |
| 10/16/1991 | EP0247205B1 Reactor shielding wall dismantling apparatus |
| 10/15/1991 | US5056499 Apparatus for cutting concrete |
| 10/15/1991 | US5056272 Method and apparatus for reducing thickness of stone slabs |
| 10/10/1991 | DE4111032A1 Concrete block processing system - has tapering and sloping chute at rotary drum outlet and aligning blocks |
| 10/09/1991 | EP0451005A2 Manufacturing process for carrier modules used to build constructions |
| 10/09/1991 | CN1055138A Explosion-proof cutting method for concrete |
| 10/08/1991 | US5054973 Tool bit with axially extending grooves in insertion end |
| 10/08/1991 | US5054246 Abrasive compacts |
| 10/02/1991 | EP0316389B1 Bandsaw |
| 10/01/1991 | US5052757 Flighting section and tooth holder |
| 09/25/1991 | EP0448527A1 An apparatus for treating medium and wide breadth surfaces |
| 09/25/1991 | EP0448510A1 Method for avoiding cracks in cutting or grinding discs |
| 09/25/1991 | EP0448314A2 Saws |
| 09/25/1991 | EP0448168A1 Method of cleaving a brittle plate and device for carrying out the method |
| 09/25/1991 | EP0334900B1 Undercutting drill |
| 09/19/1991 | DE4008582A1 Brick with gripper recesses - has each recess formed by semicircular groove between cylindrical inner and outer faces |
| 09/18/1991 | EP0446811A1 Method and apparatus for grinding diamond and diamond product using the same |
| 09/18/1991 | CN1054555A High periodic wave vibration cutting method and equipment for stone material |
| 09/11/1991 | EP0445404A2 Device for making drilled holes with undercutting |
| 09/11/1991 | EP0445168A1 Pallet cutting machine |
| 09/04/1991 | EP0445085A2 Procedure for the washing and composition control of abrasive pulps used in the cutting of granite and similar stones and relative apparatus |
| 09/04/1991 | CN1054210A Method for processing rock slab |
| 09/03/1991 | US5044696 Curb cutting system and method |
| 09/03/1991 | US5044451 Device for forming an undercut in a drilled hole |
| 08/28/1991 | EP0443123A2 Stone cutting machine |
| 08/28/1991 | CN2083533U Electric multifunctional rock quarrying machine |
| 08/22/1991 | WO1991012116A1 Hand-held machine tool |
| 08/21/1991 | EP0442104A2 Device for drilling undercutted holes |
| 08/20/1991 | US5040521 Machine for cutting tiles, particularly sandstone ones |
| 08/20/1991 | US5040501 Valves and valve components |
| 08/20/1991 | US5040445 Glazed tile cutter |
| 08/20/1991 | US5040341 Rotary cutter wheel |
| 08/16/1991 | WO1991012112A1 Apparatus and method for cutting and grinding masonry units |
| 08/14/1991 | EP0441481A1 Stain cleaning method |
| 08/14/1991 | EP0441006A2 Tool for dressing machines for stone material or the like |
| 08/14/1991 | EP0227760B1 Method and tool for punching plaster plates |
| 08/14/1991 | CN2082674U Cutter for ceramic tile |
| 08/13/1991 | US5038490 Ceramic tile gauge |
| 08/08/1991 | DE4003347A1 Control for rock separation machine with driven separating tool - using successive partial separation steps and elimination of load-free movements |
| 08/07/1991 | EP0440125A2 Laminating machine particularly for through-sawing slabs made of granite and the like |
| 08/07/1991 | EP0293399B1 Guiding rail and link chain for chain saws |
| 08/07/1991 | EP0290537B1 Bandsaw machine |
| 08/07/1991 | CA2032903A1 Stain cleaning method |
| 08/03/1991 | CA2034122A1 Laminating machine particularly for through-sawing slabs made of granite and the like |
| 07/31/1991 | CN2081793U Stone sawing machine with gravity saw frame for cutting along straight line or curve |
| 07/25/1991 | WO1991010750A1 Method for boring flue hole |
| 07/24/1991 | EP0437809A1 Process for fabrication of stove tiles |
| 07/24/1991 | CN2081340U Horizontal stone-sawing machine |
| 07/24/1991 | CN1053207A Shaft-integral type cutter wheel and cutter |
| 07/16/1991 | US5031709 Drilling apparatus for producing drilled holes having an undercut |
| 07/11/1991 | WO1991009715A1 Method for cleaving laminated mineral blocks, device for carrying out the method and a product produced by means of the method |
| 07/11/1991 | DE4000366A1 Road-surface roughening machine - incorporates tool mounted on oscillating frame attached to motor vehicle |
| 07/10/1991 | EP0436482A2 Method for artificially ageing bricks |
| 07/10/1991 | CN1052817A Method for production of composite panels based on ornamental stone or equivalent material |
| 07/09/1991 | US5030043 Driving-in device for fixing an anchor in a hole |
| 07/04/1991 | DE3943343A1 Circular saw for cutting stone blocks - is brought to rest when driving torque falls below specified minimum value |
| 07/03/1991 | EP0435442A2 Method and apparatus for cutting inorganic materials |
| 07/02/1991 | US5028176 Glass drilling machine with cooling fluid back pressure control system |
| 07/02/1991 | US5027515 Drywall twin cutting block |
| 06/30/1991 | WO1991009733A1 Methods for manufacturing composite surface elements |
| 06/30/1991 | CA2072601A1 Methods for manufacturing composite surface elements |
| 06/25/1991 | US5026432 Vacuum; pneumatic airstream; continuous collection; closed system, hazardous materials; polychlorinated biphenyls |
| 06/25/1991 | US5025871 Drilling method and rotary drill bit crown |
| 06/25/1991 | US5025615 Scarifier attachment for chain saw |
| 06/20/1991 | DE4006668C1 Sawing operation control system for stone processing machine - has measuring unit for input variable of rotary drive motor connected to computer |
| 06/19/1991 | EP0432422A2 Method and apparatus for mounting slice base on wafer of semiconductor |
| 06/19/1991 | EP0432288A1 Brittle material cutting method |
| 06/13/1991 | WO1991008092A1 Process and installation for producing large, thin, surface-treated slabs of natural stone without using floating effluent coolants |
| 06/13/1991 | DE3940743A1 Portable saw for trepanning holes and hole segments - has oscillatory drive to cup-shaped cutter having edge chosen to suit material |
| 06/11/1991 | US5022927 High pressure fluid discharge |
| 06/11/1991 | US5022193 Method of automatically gauging articles of granite, hard stones and the like of disired thickness, with discontinuous motion |