| 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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| 12/24/1997 | CN1168307A Surface treating method and apparatus by electric discharge machining |
| 12/23/1997 | US5700384 Method of manufacturing a split master link by electrical discharge machining |
| 12/18/1997 | DE19709190A1 Surface treatment by electric discharge for manufacture of cutting tools |
| 12/16/1997 | US5698114 Material made of fine particles is provided in discharge gap between workpiece and machining electrode |
| 12/04/1997 | WO1997045226A1 Method of electrochemically machining a raceway of a bearing ring and a bearing ring comprising said bearing ring |
| 12/04/1997 | WO1997045225A1 Method of electrochemically machining a bearing ring and a bearing comprising said electrochemically machined bearing ring |
| 12/02/1997 | US5693240 Surface layer forming apparatus using electric discharge machining |
| 11/25/1997 | US5690843 Method of fabricating precise cast or noncast implant-retained dental restorations using electrical discharge machining |
| 11/11/1997 | US5685971 Apparatus and method for forming a variable diameter hole in a conductive workpiece |
| 10/30/1997 | DE19627567C1 Apparatus for electrochemical production of cut-out in bore surface |
| 10/22/1997 | EP0802009A1 Method for electrochemical machining of flow channels in metallic workpieces |
| 10/22/1997 | EP0801598A2 Method of electrochemically machining workpieces |
| 10/15/1997 | EP0800431A1 Method of electrochemical machining and bearing manufactured with said method |
| 10/15/1997 | CN2264631Y Device for regulating verticality of feeding mechanism in spark puncher |
| 10/15/1997 | CN1161894A Sunface treatment method using discharging in liquid |
| 10/14/1997 | US5676861 Laser guided discharge machining apparatus |
| 10/07/1997 | US5674416 Arc treatment of metal surfaces |
| 10/01/1997 | EP0748469B1 Method for forming shaped passages |
| 09/24/1997 | EP0796163A1 Hob cutter for machining face gears, and method for manufacturing such a tool |
| 09/23/1997 | US5669991 Electrical discharge machining of complex holes using shape memory alloy electrodes |
| 09/12/1997 | WO1997033086A1 Orifice shape of a fuel injector |
| 09/02/1997 | US5662783 Electrochemical machining of aerofoil blades |
| 08/12/1997 | CA1339280C Method of producing a multi-apertured workpiece |
| 08/06/1997 | EP0787256A1 Process for producing a perforated disc |
| 08/06/1997 | EP0787255A1 Perforated disc, especially for injection valves, and process for producting it |
| 08/06/1997 | EP0787254A1 Perforated disc, especially for injection valves |
| 08/06/1997 | EP0787057A1 Process for the electrochemical treatment of flow channels in metal workpieces |
| 07/31/1997 | DE19626388C1 Machine for cutting tooth flanks in saw blade |
| 07/29/1997 | US5651901 Method and apparatus for surface treatment by electrical discharge machining |
| 07/24/1997 | DE19701170A1 Method of coating a substrate by electric discharge |
| 07/17/1997 | DE19601019A1 Injection valve for internal combustion engine |
| 07/15/1997 | US5648122 Using electrical discharge surface preparation for thermal coatings |
| 07/02/1997 | EP0781740A2 Method for processing electrically non-conductive hard materials |
| 07/02/1997 | EP0781619A1 Method of making silicone carbide wafers from silicon carbide bulk crystals |
| 06/12/1997 | WO1997017158A3 Method of electrochemically machining workpieces |
| 06/11/1997 | EP0778104A1 Surface preparation apparatus and method |
| 06/10/1997 | US5637239 Curved electrode and method for electrical discharge machining curved cooling holes |
| 06/08/1997 | CA2186667A1 Surface preparation apparatus and method |
| 05/28/1997 | EP0775565A1 Mould for the injection moulding of optical parts of illumination devices for automobiles |
| 05/20/1997 | US5630951 Methods and apparatus for making honeycomb extrusion dies |
| 05/15/1997 | WO1997017158A2 Method of electrochemically machining workpieces |
| 05/14/1997 | EP0773201A1 Sintered ceramic bodies and ceramic metal working tools |
| 05/14/1997 | EP0772843A1 Procedure for identification of objects based on forming and verifying their surface roughness as well as objects suitable to be identified |
| 05/14/1997 | CN1149907A Process for producing perforated disk |
| 04/30/1997 | CN1148528A Method of discharging processing thin hole of lower mould-hole of printing circuit board mould |
| 04/29/1997 | US5624584 Process for reducing disk deformation of holder arm of data recording device |
| 04/16/1997 | CN1147844A Perforated disc, especially for injection valves, and process for producing it |
| 04/09/1997 | EP0767026A1 Electrochemical machining process |
| 04/09/1997 | EP0767025A1 Laser guided discharge machining apparatus |
| 04/08/1997 | US5618450 Tool having interchangeable indicia marking electrodes for use in electrical discharge machining |
| 04/08/1997 | US5618449 Compact portable hand-held EDM tool |
| 04/01/1997 | US5616259 Apparatus for preparing a surface of a cylinder bore by electrical discharge machining |
| 03/25/1997 | US5614108 Method and apparatus for fast hole electrical discharge machining |
| 03/20/1997 | DE19537658A1 Method for separation of a unit from a tube plate |
| 03/19/1997 | CN1145656A Perforated disc especially for injection valves |
| 03/12/1997 | EP0761471A2 Arc treatment of metal surfaces |
| 03/06/1997 | WO1997007922A1 Method of protecting precious metal articles from copying (variants) |
| 03/01/1997 | CA2183707A1 Arc treatment of metal surfaces |
| 02/26/1997 | EP0759347A1 Method of manufacturing extrusion die for extruding honeycomb structural body |
| 02/25/1997 | US5605639 Method of producing diffusion holes in turbine components by a multiple piece electrode |
| 02/04/1997 | US5599466 Method for producing perforated valve spray disk |
| 01/15/1997 | EP0671988B1 Method of manufacturing a filter plate for the foot of a nuclear-fuel element, and a fuel element fitted with such a filter plate |
| 12/18/1996 | EP0748469A1 Method for forming shaped passages |
| 11/20/1996 | EP0743122A2 Methods for making extrusion dies |
| 11/19/1996 | CA2044581C An electro-abrasive polishing process of the inner surface of pipes to extra-smooth mirror finish |
| 11/13/1996 | EP0742070A2 Improvements in or relating to electrochemical machining of aerofoil blades |
| 10/29/1996 | US5569393 Method and apparatus for sample and defect removal from a bore |
| 10/22/1996 | US5567304 Elimination of island formation and contact resistance problems during electroetching of blanket or patterned thin metallic layers on insulating substrate |
| 10/09/1996 | EP0735934A1 Device for producing shaped holes in articles such as gas turbine engine components |
| 10/03/1996 | WO1996030645A1 Process for producing a perforated disc |
| 10/03/1996 | WO1996030644A1 Perforated disc, especially for injection valves, and process for producting it |
| 10/03/1996 | WO1996030643A1 Perforated disc, especially for injection valves |
| 10/02/1996 | DE19607288A1 Verfahren zur Herstellung einer Lochscheibe A process for producing a perforated disc |
| 10/02/1996 | DE19607277A1 Lochscheibe, insbesondere für Einspritzventile Perforated disc, especially for injectors |
| 10/02/1996 | DE19607266A1 Lochscheibe, insbesondere für Einspritzventile und Verfahren zur Herstellung einer Lochscheibe Perforated disc, especially for injection valves, and process for producing a perforated disc |
| 09/18/1996 | CN1131071A Method and equipment for controlling electric spark etching process |
| 08/14/1996 | EP0520073B1 Method of continuous processing of wire rod |
| 08/08/1996 | DE19503983A1 Laser-perforated metal mask prodn. esp. for SMD technology |
| 08/06/1996 | US5543599 Electron discharge machining apparatus and method |
| 07/23/1996 | US5539648 Method of producing a mutli-apertured workpiece |
| 07/04/1996 | WO1996020060A1 Method of electrochemical machining and bearing manufactured with said method |
| 07/04/1996 | WO1996020059A1 Method of machining a component of a bearing, an electrode for electrochemically machining said component and a method of manufacturing an electrode |
| 06/28/1996 | CA2165584A1 Method and apparatus for preparing a surface of a cylinder bore |
| 06/20/1996 | WO1996018476A1 Electric discharge machining apparatus and method |
| 06/18/1996 | US5527435 Immobilizing free, flat portion of part to be worked on |
| 06/13/1996 | WO1996017708A1 Hob cutter for machining face gears, and method for manufacturing such a tool |
| 05/22/1996 | EP0712679A2 Method and apparatus for discharge machining control |
| 05/15/1996 | DE19515078C1 Electroerosion electrode for prodn. of labelling patterns in engraving surface of plastic injection moulding tools |
| 05/07/1996 | US5514845 Electrode tube for electrical discharge machining and manufacturing method thereof |
| 05/02/1996 | WO1996012586A1 Process for the electrochemical treatment of flow channels in metal workpieces |
| 05/01/1996 | EP0709160A1 Slot fabrication by electrical discharge machining |
| 05/01/1996 | EP0709159A1 Electrochemical drilling of substrates |
| 04/25/1996 | DE4437624A1 Verfahren zum elektrochemischen Bearbeiten von Strömungskanälen metallischer Werkstücke A method for electrochemical treatment of flow ducts of metallic workpieces |
| 04/18/1996 | DE4436803A1 Internal teeth spark erosion appts. |
| 04/16/1996 | US5507925 Electrochemical drilling of substrates |
| 04/03/1996 | EP0704271A1 Surface preparation for thermal coatings |
| 04/03/1996 | EP0704270A1 Surface preparation of metal surfaces for thermal coatings |
| 03/29/1996 | CA2159139A1 Using electrical discharge surface preparation for thermal coatings |
| 03/28/1996 | DE4441055C1 Measurement-based control of spark erosion machining process |
| 03/12/1996 | US5498848 Manganese-zinc ferrite workpiece |