| 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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| 07/08/1980 | US4211908 Apparatus for high frequency discharge shaping of a workpiece by means of a rectangular bipolar pulsating voltage |
| 06/17/1980 | US4208256 Fluid pumping control method and apparatus for machine tools |
| 05/13/1980 | US4203028 Apparatus for treating optical fibers by spark erosion |
| 04/17/1980 | WO1980000669A1 Dielectric liquid and use of this liquid in a machining process by erosive electrical discharges |
| 02/20/1980 | EP0007968A1 Improvements in methods and apparatus for electrical discharge machining. |
| 01/22/1980 | US4185184 Apparatus and method for controlling the intermittent retraction of the electrode tool in an EDM machine |
| 10/30/1979 | CA1065414A1 Dielectric fluid composition for el. discharge machine process |
| 08/28/1979 | US4166011 Method for the manufacture of a shaping mask for an electroerosion tool |
| 08/07/1979 | US4163887 Pulse generator for electroerosive processing |
| 06/28/1979 | WO1979000380A1 Improvements in methods and apparatus for electrical discharge machining |
| 06/28/1979 | WO1979000379A1 Improvements in methods and apparatus for electrical discharge machining |
| 06/26/1979 | US4159407 Methods and apparatus for electrically machining a work piece |
| 06/19/1979 | US4158761 Plural work-piece positioning apparatus |
| 05/29/1979 | US4156327 Method for total form machining of metal |
| 04/24/1979 | US4151388 Current control system for electrical discharge machining apparatus |
| 03/27/1979 | US4146770 Method for controlling an electro-discharge machine tool |
| 01/16/1979 | US4134807 Process and apparatus for electrical machining of an electrode workpiece by an electrode tool, using EDM and ECM |
| 01/09/1979 | US4134000 Protection circuit for electrical discharge machining power supply apparatus |
| 10/24/1978 | CA1041009A1 Method for preserving functional fluids and liquid hydrocarbon fuels with selected 1,10-phenanthrolines |
| 09/19/1978 | US4115623 Porous material for making tool-electrode and method of producing same |
| 08/08/1978 | US4106087 Power-supply device for working machine such as a spark-erosion machine |
| 07/25/1978 | US4103137 Cutting of materials by spark erosion |
| 07/18/1978 | US4101405 Shaping apparatus |
| 05/30/1978 | US4092091 Apparatus for making a tool electrode for electrical discharge machining |
| 05/23/1978 | US4090961 Process and apparatus for monitoring the electrical discharge efficiency of an EDM machine |
| 05/09/1978 | US4087894 Aluminum oxide, titanium carbide |
| 03/21/1978 | USRE29589 Electrical discharge machining pulse control method and apparatus |
| 02/07/1978 | US4072842 Electro-erosion machine tool and a pulse generator for use in such a machine tool |
| 11/01/1977 | US4056702 Electrical discharge machining power circuit |
| 10/04/1977 | US4051747 Method for making a tool electrode for electrical discharge machining |
| 09/20/1977 | US4049942 Electric discharge machining method and device with preset electrode feed |
| 09/13/1977 | USRE29399 Servosystem for gap electrical machining processes (especially electroerosion) |
| 09/13/1977 | USRE29398 Servosystem for electrical machining processes |
| 08/30/1977 | US4045641 Control system for an electro-erosion machine tool |
| 08/16/1977 | USRE29361 Process for shaping workpiece by electrical discharge and apparatus therefor |
| 05/31/1977 | US4027134 Electrode for electrical discharge machining |
| 04/12/1977 | US4017705 Impulse current generator for electroerosion machining of metals |
| 03/22/1977 | US4013863 Method of finishing a workpiece of a non-conducting material, particularly diamond, by means of spark erosion |
| 02/22/1977 | US4009361 Electrical discharge machining apparatus with monitoring circuit and means to check the operability of the monitoring circuit |
| 02/01/1977 | US4005635 Methods and equipment for machining electrodes |
| 01/25/1977 | US4005304 Electrical discharge machining process with fluid containing a cationic organic surfactant |
| 01/25/1977 | US4005303 EDM parameter control system |
| 01/18/1977 | US4004123 Method of and system for the controlling of an apparatus for the electric discharge machining of a workpiece |
| 12/21/1976 | US3999028 Method and apparatus for electrical discharge machining |
| 12/14/1976 | US3997753 Control system and method for electric discharge machining (EDM) using a predetermined portion of each discharge pulse for monitoring |
| 12/07/1976 | US3996445 Timing sequence control system for electrical discharge machining |
| 11/09/1976 | US3990868 Method of making cutting master for erosion machining |
| 10/26/1976 | US3988560 Method and apparatus for controlling generation of machining pulses in EDM power supply |
| 10/19/1976 | US3987271 Electrical discharge machining power supply circuit |
| 10/19/1976 | US3987269 Method of controlling electrical discharge machining |
| 08/17/1976 | US3975607 Method and apparatus for controlling an electroerosion machining operation |
| 08/10/1976 | US3974357 Process and apparatus for electrical discharge shaping using sequential switching |
| 07/13/1976 | US3969602 Structure for and method of electroerosion machining |
| 07/13/1976 | US3969601 Electronic spark treating and eroding metals |
| 06/15/1976 | US3963894 Turbine-nozzle manufacturing apparatus |
| 06/15/1976 | US3962830 Machining structure |
| 05/11/1976 | US3956609 Pulse generator for electro-erosion machining apparatus |
| 05/11/1976 | US3956085 Method for the manufacture of a tool-set for the forming of sheet metal objects |
| 04/20/1976 | US3951833 Method for preserving functional fluids and liquid hydrocarbon fuels with selected 1,10-phenanthrolines |
| 04/06/1976 | US3948620 Method of making cutting master for erosion machining |
| 03/09/1976 | USRE28734 EDM power supply for generating self-adaptive discharge pulses |
| 03/09/1976 | US3943321 Or pulse trains of variable durations |