| Patents for B23K 13 - Welding by high-frequency current heating (1,807) |
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| 06/29/1999 | US5915421 Method of forming seamed metal tube |
| 06/29/1999 | CA2105406C System for grooving and rolling linear member and flat heat exchanger tube resulting therefrom |
| 06/17/1999 | WO1999029465A1 Microwave brazing process and brazing composition for tsp diamond |
| 05/19/1999 | EP0705155B1 Method of forming seamed metal tube |
| 05/11/1999 | US5902506 Matching apparatus for connecting high frequency solid state electrical power generator to a load |
| 05/04/1999 | US5900079 Method for producing a steel pipe using a high density energy beam |
| 04/27/1999 | CA2142464C A continuous hot rolling method of metal blocks, as well as a metal blocks joining apparatus, a table roller for conveying the metal blocks, a poor joined portion removing apparatus and a metal block cooling apparatus which are used to carry out said method |
| 04/13/1999 | CA2156195C Method and apparatus for joining metal pieces |
| 03/31/1999 | EP0904884A2 Welding |
| 03/30/1999 | US5889263 Apparatus and a method for induction sealing |
| 03/30/1999 | US5889262 System for and method of automatically controlling amount of input heat in high-frequency electric resistance welding machine |
| 03/09/1999 | CA2241061A1 Welding |
| 03/02/1999 | US5875954 Bonded pipe and method for bonding pipes |
| 02/25/1999 | WO1999008828A1 Apparatus for amorphous bonding of tubulars |
| 02/17/1999 | CN1207966A Continuous rolling method of metal blocks |
| 02/16/1999 | US5871138 Method and apparatus for continuous finishing hot-rolling a steel strip |
| 01/27/1999 | EP0893188A2 Process for joining metallic members together |
| 01/19/1999 | US5860204 Continuous tube forming and coating |
| 12/09/1998 | EP0772508B1 Workpiece welding process and device |
| 12/09/1998 | CN1200970A Input heat-quantity automatic control system and method for high-frequency resistance welding device |
| 12/03/1998 | DE19722485A1 Automatic control system for high frequency electric resistance welding |
| 11/25/1998 | EP0834240A4 Induction welding of tubing with multiple induction coils |
| 11/10/1998 | US5834743 Induction heating apparatus and method for fusing intercell connectors to battery cell terminals |
| 11/03/1998 | US5831252 Methods of bonding titanium and titanium alloy members by high frequency heating |
| 10/13/1998 | US5819384 Heat exchanger tubing production plant |
| 10/07/1998 | EP0868832A1 Impedance matching apparatus for connecting high frequency solid state electrical power generator to a load |
| 09/02/1998 | EP0814937A4 Method of forming seamed metal tube |
| 08/20/1998 | DE19706054A1 Induktionsschweißeinrichtung und Arbeitsverfahren zum Verbinden mehrerer Vorbänder in einer Anlage zur Endlosherstellung von warmgewalztem Stahlband Induction welding equipment and the procedures for connecting several billets in a plant for continuous production of hot-rolled steel strip |
| 08/13/1998 | WO1998034754A1 Induction welding device and operational method for joining several pre-strips in an installation for continuous production of a hot-rolled steel strip |
| 08/11/1998 | CA2089849C Welding management apparatus |
| 08/06/1998 | WO1998033619A1 Method and device for joining oilfield tubulars |
| 08/04/1998 | US5788789 Power device for fusing plastic pipe joints |
| 07/28/1998 | US5786576 Self-steering system for guiding a moving induction coil during thermoplastic welding |
| 07/28/1998 | US5786575 For inducing an electric current in a heating element |
| 06/23/1998 | US5770837 Layers of allos with u-shaped cross-section |
| 06/16/1998 | US5767490 Apparatus for fusing two workpieces produced from sheet metal by induction heating |
| 06/10/1998 | EP0847095A1 Apparatus and method for fusing intercell connectors to battery cell terminals |
| 06/02/1998 | US5760378 Method of inductive bonding sintered compacts of heavy alloys |
| 05/28/1998 | WO1998022266A2 Fibrous sheet material |
| 05/19/1998 | US5753894 Hot rolling method for continuously joining metal blocks and an apparatus for the same |
| 04/22/1998 | EP0767717B1 A method for heating closely spaced end portions of two pipes |
| 04/08/1998 | EP0834240A1 Induction welding of tubing with multiple induction coils |
| 03/31/1998 | US5732874 Method of forming seamed metal tube |
| 03/24/1998 | US5730189 Internally and externally enhanced wielded tube |
| 03/18/1998 | EP0711218B1 An apparatus for fusing two workpieces produced from sheet metal |
| 03/05/1998 | DE19635843A1 Laser pipe-welding installation |
| 03/04/1998 | CN1037587C Connecting process and continuous hot-rolling process for billet in hot-rolling |
| 02/26/1998 | DE19634681A1 Apparatus for a pipe welding installation |
| 02/25/1998 | EP0824976A2 Method for the production of thin-walled tubes |
| 02/24/1998 | US5721413 Method for heating closely spaced portions of two pipes |
| 02/05/1998 | DE19630703A1 Verfahren und Vorrichtung zum Reparaturschweißen von Teilen aus Ni-Basis-Legierungen Method and apparatus for repair welding of parts made of Ni-based alloys |
| 01/21/1998 | CN1170643A Producing method and preparing equipment for steel pipe |
| 01/07/1998 | EP0816006A1 Electrode for high frequence welding |
| 01/07/1998 | EP0814937A1 Method of forming seamed metal tube |
| 12/24/1997 | WO1997048515A1 Method and installation for butt welding two sheet sections, and coil for use therewith |
| 12/23/1997 | US5699950 Ultrasonic vibration welder |
| 12/17/1997 | EP0812633A1 Method of and apparatus for producing steel pipes |
| 12/17/1997 | CN2270592Y 电子熔断器 Electronic fuse |
| 12/16/1997 | CA2067772C Method of joining steel sheet bars in hot rolling and a continuous hot rolling method |
| 11/26/1997 | EP0778797A4 Manufacture of internally enhanced welded tubing |
| 11/12/1997 | EP0806255A1 Welding device for the longitudinal welding of copper alloy or aluminium tubes |
| 11/12/1997 | CN2267120Y High frequency tube welding machine and double roller automatic bore positioning device |
| 10/07/1997 | US5673579 Welded steel pipe manufacturing apparatus and method |
| 09/24/1997 | EP0796718A1 An apparatus and a method for induction sealing |
| 08/27/1997 | CN1158096A Manufacture of internally enhanced welded tubing |
| 07/29/1997 | US5651819 Continuous tube forming and coating |
| 07/08/1997 | CA2066105C Welding management apparatus |
| 07/03/1997 | WO1997023325A1 Assembly and method for making catalytic converter structures |
| 06/26/1997 | WO1997023118A1 Wrap tool for magnetic field-responsive heat-fusible pipe couplings |
| 06/26/1997 | WO1997022523A1 A method and device for accomplishing a joint of polymer lined aluminium |
| 06/19/1997 | WO1997022228A1 Impedance matching apparatus for connecting high frequency solid state electrical power generator to a load |
| 06/19/1997 | DE19547133A1 Ribbed tube production method by induction heating and welding of strip |
| 06/18/1997 | EP0778797A1 Manufacture of internally enhanced welded tubing |
| 05/14/1997 | EP0772508A1 Workpiece welding process and device |
| 04/30/1997 | CN1148522A Steel-band continuously hot final rolling method and apparatus thereof |
| 04/23/1997 | EP0769344A1 Welded pipe and pipe welding method |
| 04/23/1997 | CN1147988A Two-in-one working art for medium frequency welding and quenching coal cutter teeth |
| 04/16/1997 | EP0767717A1 A method for heating closely spaced end portions of two pipes |
| 04/02/1997 | EP0550578B1 Interengageable structural members |
| 03/27/1997 | DE4406220C2 Neues Fügeverfahren zum Verbinden von Metallen und Keramiken durch hochfrequente Felder New joining method of joining metals and ceramics by high-frequency fields |
| 03/26/1997 | EP0764493A1 Induction welding method and system for forming a fluidtight joint between metal pipes |
| 03/19/1997 | EP0717667B1 Heat exchanger tubing production plant |
| 03/12/1997 | EP0761378A1 Method and apparatus for bonding crossing rails |
| 03/12/1997 | CN1144639A Electromagnetism heating metal plate and its manufacturing method |
| 01/15/1997 | EP0753359A1 Method and apparatus for continuous finishing hot-rolling a steel strip |
| 01/15/1997 | CN1140116A Method for producing electric-resistance-welded steel pipe |
| 12/27/1996 | WO1996042183A1 Power device for fusing plastic pipe joints |
| 12/18/1996 | EP0748661A1 A welded steel pipe manufacturing apparatus and method |
| 12/17/1996 | US5584428 Plating nickel boride layer on facing surface of one pipe, inserting inner pipe into outer, cold working to reduce diameter, heat treating to join pipes by diffusion bonding |
| 12/12/1996 | WO1996039789A1 Induction welding of tubing with multiple induction coils |
| 11/28/1996 | WO1996038020A1 Inductor |
| 11/19/1996 | USRE35378 Method of forming seamed metal tube |
| 11/07/1996 | WO1996034717A1 Welded pipe and pipe welding method |
| 11/06/1996 | CN2239318Y Hi-frequency rotary welding screening tube machine |
| 11/05/1996 | US5571437 Induction welding of tubing with multiple induction coils |
| 10/30/1996 | EP0739678A1 Method for producing an electric-resistance-welded steel pipe |
| 10/22/1996 | US5567335 Process and apparatus for welding sheet metal edges |
| 09/12/1996 | WO1996027475A1 Method of forming seamed metal tube |
| 09/04/1996 | CN2234328Y High frequency induction heating welder |
| 07/17/1996 | EP0721818A1 Method of manufacturing laser welded pipes and apparatus for manufacturing the same |