| Patents for B23H 1 - Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric (3,662) |
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| 03/28/1990 | CN1040753A Apparatus for preparation of machining liquid for electroerosion machine |
| 03/28/1990 | CN1040752A Apparatus for preparing the machining liquid of electroerosion machine |
| 03/28/1990 | CN1040751A Apparatus for preparing machining liquid of electroerosion machine |
| 03/21/1990 | EP0124625B1 Electric discharge machining control circuit |
| 03/20/1990 | CA1266891A1 D.c. motor driven edm head |
| 03/08/1990 | WO1990002361A1 Apparatus and method for producing three-dimensional objects |
| 03/07/1990 | EP0356921A1 Method and device for the electroerosive machining of metal work pieces |
| 02/28/1990 | EP0355633A1 Device for the treatment of the machining liquid of an electroerosion machine |
| 02/28/1990 | EP0355632A1 Method for the treatment of the machining liquid of an electroerosion machine |
| 02/28/1990 | EP0355631A1 Device for the treatment of the machining liquid of an electroerosion machine |
| 02/22/1990 | WO1990001389A1 Device for supplying a machining solution to a discharge machining apparatus |
| 02/07/1990 | EP0353301A1 Device for making holes in work pieces by electro-erosion |
| 01/09/1990 | US4892989 Discharge machining apparatus having means for distinguishing abnormal interelectrode gap conditions |
| 01/02/1990 | US4891487 Electrode return control for electric spark machine |
| 01/02/1990 | US4891486 Device for feed control of electrode-tool in spark erosion machines |
| 01/02/1990 | US4891162 Triethanolamine salt in water |
| 12/27/1989 | EP0347716A1 Electrical discharge machine |
| 12/27/1989 | CN1038236A Metal bonded abrasive-wheel forming and correcting method |
| 12/20/1989 | EP0147473B1 Power source for electrical discharge machining |
| 12/19/1989 | US4888462 Device and process for machining by electroerosion |
| 12/13/1989 | EP0345353A1 Machining center |
| 11/23/1989 | EP0342698A1 Method for the controlled retraction of a sinking electrode in an electroerosion machine |
| 11/21/1989 | US4882464 Electrical discharge machining equipment |
| 11/01/1989 | CN1036721A Servocontrol device for erosion machine |
| 10/25/1989 | EP0338311A1 Oil composition containing hydrogenated oil |
| 09/26/1989 | US4870243 Electrical discharge methods and apparatus therefor |
| 09/26/1989 | US4870242 Clamping mechanism for securing an EDM electrode holder in a hydraulic chuck |
| 09/20/1989 | EP0333170A1 Servo control for an erosion machine |
| 09/19/1989 | US4868760 Wire electric discharge machining control apparatus |
| 09/19/1989 | US4868363 Apparatus for supplying a working fluid in an electric discharge machine |
| 09/05/1989 | US4864092 Electric discharge machining power source |
| 09/05/1989 | US4864091 Servocontrol device for an erosion machine |
| 09/05/1989 | US4863579 Power supply system for electrolytic processing apparatus |
| 08/30/1989 | EP0146635B1 System for controlling retraction of electrode of electric discharge machine |
| 08/29/1989 | US4861450 Power supply system for electrolytic processing apparatus |
| 08/23/1989 | CN1034883A Machining method of polycrystalline diamond by using mechano-electrical pulse |
| 08/22/1989 | US4859824 Electrospark machine system, assembly for use with system, device for mounting electrospark machining electrode, and method of shaping a workpiece |
| 08/16/1989 | EP0327621A1 Electro-discharge machining electrode and method of forming |
| 08/16/1989 | CN2042766U Wire coiling machine |
| 08/15/1989 | US4857688 Machining fluid supply controlling system for a wire cut electrical discharge machine |
| 08/10/1989 | WO1989007030A1 Power source for electric discharge machining |
| 08/10/1989 | WO1989007029A1 Electric discharge machining apparatus preventing electrolytic corrosion by short-circuit detection voltage |
| 08/10/1989 | WO1989007028A1 Device for electro-erosive perforation of parts |
| 08/08/1989 | US4855557 Electrical discharge machining electrode |
| 07/25/1989 | US4851634 Device for electrical discharge piercing of holes in components |
| 07/25/1989 | US4851633 Process and apparatus for employing electroerosion |
| 07/25/1989 | US4850147 Electrode shaping |
| 07/18/1989 | US4849122 Transparent electrical discharge machining fluid |
| 07/11/1989 | EP0327621A4 Electro-discharge machining electrode and method of forming. |
| 06/14/1989 | EP0295264A4 Electrical discharge machining by redressing electrodes. |
| 06/13/1989 | US4839488 Electric discharge machine using a ceramic filter to filter the working fluid |
| 05/23/1989 | US4833289 Electric discharge machining control apparatus |
| 05/16/1989 | EP0375774A4 Device for electro-erosive piercing of openings in parts. |
| 05/10/1989 | EP0314711A1 Liquid for edm machinine |
| 05/05/1989 | WO1989003745A1 Machining center |
| 05/03/1989 | CN1032633A Multifunction plate-cutting machine with electrosparking cutting disk |
| 04/26/1989 | EP0313049A1 Device for machining workpieces by electro-erosion |
| 04/26/1989 | EP0312674A1 Erosion electrode, in particular a wire electrode for electrical discharge machining |
| 04/26/1989 | CN1003983B Operating fluid for electrospark machine |
| 04/18/1989 | US4822970 Method and apparatus for purging the eroding zone during electroerosive countersinking |
| 04/11/1989 | US4820895 Electric discharge machine position finding apparatus |
| 04/11/1989 | US4819325 Method of forming electro-discharge machining electrode |
| 03/22/1989 | CN2034492U Multipurpose big power electrical spark discharge strengthening equipment |
| 03/21/1989 | US4814573 Electrical discharge machining apparatus with exchangeable electrode refeed cartridge |
| 02/28/1989 | US4808200 Electrostatic precipitator power supply |
| 02/22/1989 | EP0304235A2 Electrical discharge method and working fluid therefor |
| 02/21/1989 | US4806719 Method and device for monitoring a spark-eroding process in a spark-eroding machine |
| 02/15/1989 | EP0303240A1 Installation and method to filter a machining fluid in an uninterrupted supplying circuit |
| 02/07/1989 | USRE32855 Capacitor-type pulse generator for electrical discharge machining, especially for wire-cutting EDM |
| 01/24/1989 | US4800248 Electrical discharge machining apparatus with discharge current control |
| 01/18/1989 | EP0299161A1 Tool holder for spark erosion machines |
| 01/17/1989 | US4798929 Wire electric discharge machining apparatus |
| 01/10/1989 | US4797527 Electrode for electric discharge machining and method for producing the same |
| 12/21/1988 | EP0295264A1 Electrical discharge machining by redressing electrodes. |
| 12/20/1988 | US4792653 Electrical discharge machining apparatus including a shield for preventing deformation by temperature |
| 12/15/1988 | WO1988010017A1 Electro-discharge machining electrode and method of forming |
| 12/07/1988 | EP0294082A2 Electrical discharge apparatus |
| 12/07/1988 | EP0293484A1 Apparatus for discharge machining |
| 12/06/1988 | US4789447 Apparatus for working electrically conductive materials by electric erosion |
| 12/01/1988 | WO1988009238A1 Electrode for electric spark cutting |
| 11/29/1988 | US4788399 Electrical circuit for electro-discharge machines |
| 11/29/1988 | CA1245728A1 Electrode-tool for electroerosive drilling of holes in workpieces and methods of electroerosive drilling of holes in workpieces by such electrode-tool |
| 11/23/1988 | EP0292440A1 Method of electroerosion cutting |
| 11/23/1988 | EP0292081A1 Phase-spark-erosion device |
| 11/22/1988 | US4786778 Electrical discharge machining fine finish circuit with symmetrical waveform in both polarities |
| 11/22/1988 | US4786777 Process and apparatus for wire electrode trimming using a laser |
| 10/19/1988 | EP0286686A1 Processing liquid supply control system for wire cut electric discharge machines |
| 10/19/1988 | EP0286685A1 Method of controlling wire cut discharge machining |
| 10/11/1988 | US4777339 Gap voltage sensing network for electrical discharge machining power supply |
| 10/06/1988 | WO1988007428A1 Liquid for edm machinine |
| 09/28/1988 | EP0283523A1 Device for control of feeding the electrode tool in electro-erosion machine tools |
| 09/21/1988 | EP0283205A2 Electro-discharge machining apparatus |
| 09/20/1988 | US4772788 Corona discharge treating system |
| 09/07/1988 | EP0281512A1 Device and method for electrical-discharge machining |
| 08/30/1988 | US4767906 Electrical discharge machining medium-reduced electrode comsumption-alcohol modified polyether |
| 08/30/1988 | US4767905 EDM method and apparatus with trapezoidized short-duration pulses |
| 08/23/1988 | US4766281 Pulse generator spark-erosive metal working |
| 08/16/1988 | US4764653 Process and apparatus employing electroerosion |
| 08/03/1988 | EP0276314A1 Discharge machining controller |
| 07/27/1988 | EP0275819A2 Labyrinth-type filter for the dielectric fluid of electro-discharge machines |