| Patents for B23H 9 - Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects (3,245) |
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| 01/09/1992 | DE4021384A1 Method of producing set of press tools - by electroplating model covered with layer of conductive material |
| 01/08/1992 | EP0464264A2 Electrical discharge machining tool |
| 01/05/1992 | WO1992000825A1 Method of finishing gear by electrolytically machining and method of machining electrode used therein |
| 01/05/1992 | CA2067097A1 Electrolytic finishing method of finishing a bevel gear and a method of machining an electrode used for the electrolytic finishing method |
| 12/31/1991 | US5077456 Portable device for cutting the inside wall of a tube by a continous arc |
| 12/11/1991 | EP0460369A1 Method and apparatus for electrical perforation of paper for cigarettes |
| 12/10/1991 | US5071525 Method of grinding lenses and apparatus therefor |
| 12/04/1991 | EP0459101A1 Device for deburring the edges in the rod-eyes of connecting rods |
| 11/27/1991 | EP0457975A1 Electrochemical machining of microholes |
| 11/13/1991 | EP0441887A4 Method of processing orifices |
| 11/05/1991 | US5062931 Electrochemical polishing of thread fastener test specimens of nickel-chromium iron alloys |
| 10/23/1991 | EP0452798A2 Method for drilling a hole |
| 10/23/1991 | EP0452501A1 Electro-abrasive Polishing Process of the Inner Surface of Pipes to Extra-smooth Mirror Finish |
| 10/22/1991 | US5059289 Method and electrode for forming passages in workpieces |
| 10/17/1991 | DE4111798A1 Control ports in door closers - are produced by spark erosion or laser machining |
| 10/08/1991 | US5055650 Electrode carrier for electrode-erosion machining device |
| 10/02/1991 | EP0449694A1 Electrode holder for electroerosive machining |
| 10/02/1991 | EP0449662A1 A fuel injector and a method of relieving stress concentration within a fuel injector bore |
| 09/24/1991 | US5051559 Nozzle fabrication technique |
| 09/21/1991 | CA2038461A1 Electrode holder for spark erosion machining |
| 09/18/1991 | EP0446742A2 Method and apparatus for manufacturing welded electrically-conductive microstructures on probe heads and use thereof |
| 09/11/1991 | EP0446165A1 Method and apparatus for electrochemical machining of spray holes in fuel injection nozzles |
| 09/11/1991 | EP0445679A2 Method and apparatus for fabricating electrically conductive probe heads |
| 09/04/1991 | CN1013748B Machining method of polycrystalline diamond by using mechano-electrical pull |
| 08/22/1991 | WO1991011962A1 Curved bore drilling apparatus |
| 08/21/1991 | EP0441887A1 Method of processing orifices. |
| 08/14/1991 | EP0441154A2 Apparatus and method for self induced repair of circuit shorts and near-shorts |
| 08/07/1991 | EP0222023B1 Device for confirming formation of holes in discharge machining apparatus |
| 08/06/1991 | US5036732 Method for making a cutting element for use in a rotary cutting tool |
| 07/30/1991 | US5036173 Electrical discharge apparatus with a dielectric fluid assembly |
| 07/30/1991 | US5035788 Electrochemical drilling apparatus |
| 07/23/1991 | US5034589 Electrical discharge apparatus for producing a textured finish on a conductive surface |
| 07/23/1991 | US5034106 Electrolytic erosion of metals by impinging a stream |
| 07/16/1991 | US5032963 Lens for traffic lights and method of making same |
| 07/09/1991 | US5029759 Curved hole machining method and fuel injector formed thereby |
| 07/02/1991 | US5028755 Spark erosion machine tool |
| 06/25/1991 | US5026960 Chip breaker for polycrystalline CBN and diamond compacts |
| 06/25/1991 | US5026462 Method and apparatus for electrochemical machining of spray holes in fuel injection nozzles |
| 06/18/1991 | US5024725 Localized etching in gas or liquid phase |
| 06/11/1991 | US5023422 Method of and apparatus for forming a slot in a workpiece |
| 06/11/1991 | US5022955 Apparatus and method for self-induced repair of circuit shorts and near-shorts |
| 05/28/1991 | US5019683 Electroerosive drilling of holes with working fluid system |
| 05/22/1991 | EP0427876A1 Electric spark machining electrode and method of production thereof |
| 05/21/1991 | US5016820 Fuel injectors for internal combustion engines |
| 05/16/1991 | WO1991006256A1 Process for manufacturing tooth replacements by spark erosion and device for clamping, inserting and truing plaster models or copper electrodes for the spark-erosion manufacture of tooth replacements |
| 05/14/1991 | US5015346 Electrochemical method for defect delineation in silicon-on-insulator wafers |
| 05/14/1991 | US5014421 Contoured blade edge cutting method |
| 05/08/1991 | EP0426233A1 A process for manufacturing an impeller or a rotor having one or more blades for a turbine pump by means of electrical discharge machining, and articles so obtained |
| 05/08/1991 | EP0425812A2 Chip breaker for polycrystalline CBN and diamond compacts |
| 05/02/1991 | WO1991006388A1 Method of super-mirror finishing with electrolytic grinding for internal surface of small-diameter tube |
| 05/02/1991 | WO1991005627A1 Rotary cathode |
| 05/02/1991 | EP0425236A1 Fuel injection nozzles for internal combustion engines |
| 05/01/1991 | CA2023388A1 Chip breaker for polycrystalline cbn and diamond compacts |
| 04/30/1991 | US5012062 Arc-textured high emittance radiator surfaces |
| 04/23/1991 | US5010224 Very small orifice manufacturing system |
| 04/19/1991 | CA2027366A1 Electrochemical etching apparatus |
| 04/16/1991 | US5008509 Production method of honeycomb die-forming electrical discharge machining electrodes and production method of honeycomb dies |
| 04/02/1991 | US5004883 Method of fabricating plural shaped parts from a workpiece |
| 04/02/1991 | US5004529 Electrochemical etching apparatus |
| 03/26/1991 | US5002546 Curved bore drilling apparatus |
| 03/12/1991 | US4999093 Retracted and machining positions; interleaving fingers; turbine blades |
| 03/06/1991 | EP0210195B1 Ball-point writing instrument containing an aqueous ink composition |
| 03/05/1991 | US4997266 Examination slide grid system |
| 02/27/1991 | CN1049573A Process for producing substrate for selective crystal growth, selective crystal growth process and process for producing solar battery by use of them |
| 02/26/1991 | US4995949 Orifice sizing using chemical, electrochemical, electrical discharge machining, plating, coating techniques |
| 02/20/1991 | CN1049305A Electrochemical machining apparatus for compromise face |
| 02/13/1991 | CN2071103U Plane eletrolytic etching machine |
| 02/12/1991 | US4992639 Combined EDM and ultrasonic drilling |
| 02/12/1991 | US4991280 Method for replacing bolts on core components in nuclear reactors |
| 02/05/1991 | US4990737 Initial hole machining device for a wire-cut electric discharge machine |
| 01/29/1991 | US4988425 Electrode with both outside and inside flow of electrolyte for electrochemical machining |
| 01/23/1991 | CN2069766U Mechanical device of copying electric spark machine for cutting needle clack seat surface of oil nozzle |
| 01/22/1991 | US4985992 Method of making stator stages for compressors and turbines, and stator vanes and vane arrays produced thereby |
| 01/16/1991 | CN2069325U Hobbing cutter electric spark reinforced jig |
| 01/15/1991 | US4985609 Method of making a broach |
| 01/08/1991 | US4983078 Rotary cutting tool |
| 12/19/1990 | EP0402840A1 Method and apparatus for non-contact machining with dynamic feedback control |
| 12/13/1990 | WO1990014918A1 Electric spark machining electrode and method of production thereof |
| 12/05/1990 | EP0248068B1 Apparatus for the formation of holes |
| 11/22/1990 | EP0398571A1 Multi-disc cutter and method of manufacture |
| 11/22/1990 | EP0398415A1 Method for forming combs for application to suction nozzles for seizing the end of yarns wound in packages, and the improved combs obtained |
| 11/14/1990 | EP0397449A1 Electrode support structure |
| 10/31/1990 | DE4012731A1 Producing medical implant with defined surface roughness - applying spark erosion with titanium electrodes for shaping and roughening in single operation for enhanced adhesion |
| 10/24/1990 | EP0393415A1 Electrolytic etching apparatus and method for marking metal tubes with sequential identification numbers |
| 10/19/1990 | CA2014834A1 Electrolytic etching apparatus and method for marking metal tubes with sequential identification numbers |
| 10/17/1990 | CN1046111A Method and devices for extraction of closure plug from steam generator tube |
| 10/10/1990 | EP0391777A1 Method and device for removing a plug from a steam generator tube |
| 10/04/1990 | CA2013685A1 Process and apparatus for extracting the blanking plug of a steam generating tube |
| 10/03/1990 | EP0390757A2 Lens for traffic lights and method of making same |
| 10/03/1990 | EP0390550A1 Forming passages in workpieces |
| 10/03/1990 | EP0390318A2 Method of and apparatus for forming a slot in a workpiece |
| 10/02/1990 | US4960971 Wire EDM with apparatus supporting a workpiece through wall of machining bath |
| 09/26/1990 | EP0389221A1 Production method of honeycomb die-forming electrical discharge machining electrodes and production method of honeycomb dies |
| 09/04/1990 | CA1273683A1 Device for electrical discharge piercing of holes in components |
| 08/22/1990 | CN2060740U Implement for carving metal and marble |
| 08/21/1990 | US4950860 Electro-discharge machining apparatus |
| 08/14/1990 | US4948933 Apparatus for cutting precision notches in work surfaces |
| 08/14/1990 | US4948488 Apparatus for the electrochemical machining of fashioned surfaces |
| 08/07/1990 | US4947016 Method and apparatus for duplicating steel intaglio print elements using electro-erosion machining |
| 07/31/1990 | US4944856 Electrolytic etching apparatus and method for marking metal tubes with sequential identification numbers |