| Patents for B21C 37 - Manufacture of metal sheets, rods, wire, tubes, profilesor like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape (9,784) |
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| 09/05/1989 | CA1259018A1 Filamentary structural module for composites |
| 08/29/1989 | US4861388 Method for contact conductor for electric vehicles |
| 08/29/1989 | CA1258783A1 Mill for roll forming a fluted tube |
| 08/16/1989 | EP0328473A1 Apparatus for cutting segments for radius elbows |
| 08/15/1989 | US4856824 Method of manufacture of manifolds and manifold provided by such method |
| 08/15/1989 | US4856165 Method for producing by welding a finned heat exchanger pipe |
| 08/15/1989 | US4856163 Combustor of high pressure burner for rocket engine and method of fabrication thereof |
| 08/10/1989 | DE3802445A1 Steel strip for the production of welded steel tubes |
| 08/08/1989 | US4854148 Cold drawing technique and apparatus for forming internally grooved tubes |
| 08/02/1989 | EP0326085A2 Production of nozzle member |
| 07/20/1989 | DE3832342C1 Platinum-jacketed wire, method for production of a platinum-jacketed wire and use of a platinum-jacketed wire |
| 07/18/1989 | US4847989 Spiral expanding bullet |
| 07/11/1989 | US4847230 Multilayer corrugated and smooth metal sheets |
| 07/11/1989 | US4846392 Continuously variable speed, die-drawing device and process for metal, composites, and the like, and compositions therefrom |
| 07/11/1989 | US4846264 Composite pipe, process for producing the same, and heat pipe using the same |
| 07/11/1989 | CA1257248A1 Heat exchanger |
| 07/06/1989 | DE3842865A1 Method of fabricating a longitudinally welded tube |
| 07/06/1989 | DE3808728A1 Method for the production of a tube with a longitudinal seam |
| 07/05/1989 | EP0322889A2 Manufacturing method of extra fine wire |
| 07/05/1989 | EP0322758A1 Process and device for the heat-treatment of the welding joints of longitudinally welded metal tubes |
| 07/05/1989 | EP0322722A2 Method and apparatus for forming lateral collars on sheet metal tubes |
| 06/29/1989 | WO1989005698A1 Method of working double tube |
| 06/27/1989 | US4842818 Coil springs for automobiles or railroad cars |
| 06/27/1989 | US4841617 Method for producing heat exchanger tubes |
| 06/27/1989 | US4841616 Helically wound elbow conduit and method of fabricating same |
| 06/21/1989 | CN2039603U Make-up mechanism for screwed pipe |
| 06/21/1989 | CN1033449A Monolayer braze welding pipe and its making method |
| 06/20/1989 | US4840053 Method for manufacturing a pipe with projections |
| 06/15/1989 | WO1989005202A1 Process and apparatus for producing spirally-seamed metal tubing |
| 06/15/1989 | WO1989005201A1 Process and device for manufacturing tubes with helically arranged seams |
| 06/15/1989 | DE3741039A1 Method for producing drainpipe bends and ventilating-pipe bends for roofing and ventilating systems |
| 06/13/1989 | US4838066 Process and a device for the production of grooves on a wall of revolution |
| 06/13/1989 | US4838063 Applying low melting metal(s) and flux to interior of tube; heating |
| 06/07/1989 | EP0318905A2 Method and apparatus for making downpipes |
| 06/07/1989 | EP0318583A1 Device for removing internal burrs in welded pipes |
| 06/07/1989 | CN2038820U Portable thin-wall tube riveter |
| 06/06/1989 | CA1255188A1 Process and apparatus for forming flexible tubular bodies with multiple helical elements |
| 05/31/1989 | EP0227674B1 Method and device for the helicoidal winding of sheet-like material |
| 05/24/1989 | EP0317075A1 Fabrication and assembly of metal catalytic converter catalyst substrate |
| 05/18/1989 | DE3818756C1 Device for the production of helical recesses on the inside of tubes |
| 05/10/1989 | CN2037270U Multi-rod multi-ring multi-circle heat pushing seamless elbow-pushing machine |
| 05/10/1989 | CN1032758A Method of and apparatus for producing tubes with small diameter and thick wall |
| 05/09/1989 | US4827590 Method of making of header for automotive air conditioner evaporator |
| 05/05/1989 | WO1989003730A1 Apparatus for making helically wound interlocked flexible pipe |
| 05/03/1989 | EP0313896A1 Manufacturing method and device for manufacturing optical cables |
| 05/02/1989 | US4827099 Method and apparatus for continuous production of tubular bodies by means of laser longitudinal seam welding |
| 05/02/1989 | US4825941 Condenser for use in a car cooling system |
| 04/27/1989 | DE3735076A1 Method for the production of a double-walled tubular hollow body, tools for carrying out the method and a hollow body produced by the method |
| 04/26/1989 | EP0122260B1 High pressure bellows capsule and method of making same |
| 04/25/1989 | US4823847 Multi-layer helical seam steel pipe |
| 04/25/1989 | US4823579 Apparatus for cutting hollow pipes |
| 04/25/1989 | CA1252990A1 Method and apparatus for forming an air gap pipe |
| 04/13/1989 | DE3733362A1 Profiled flat wire, in particular for grid-like frameworks (stands, supports) and grid-like cages |
| 04/11/1989 | US4819858 Preheating, solid-phase bonding, quench in cooling liquid; oxidation resistance |
| 04/06/1989 | DE3731669A1 Flat heat exchanger tube |
| 04/05/1989 | EP0309512A1 Process and devices for the manufacture of pipes with longitudinal seams |
| 04/05/1989 | CN1032126A Device for guiding and turning die for manufacture of metal foils |
| 04/04/1989 | US4817259 Composite pipe, process for producing the same, and heat pipe using the same |
| 03/28/1989 | US4816099 Method for the production of a composite pipe and an apparatus for the same |
| 03/28/1989 | US4815185 Method for belling and expanding coils |
| 03/16/1989 | DE3824177A1 Device for guiding and turning a die for the production of metal foil |
| 03/15/1989 | EP0306672A2 Method and apparatus for helically coiling metal strip on tubes |
| 03/14/1989 | US4811888 Method and apparatus for manufacturing small diameter, thick walled, cable sheaths |
| 03/14/1989 | EP0232331A4 Roll forming of metal articles. |
| 03/14/1989 | CA1251097A1 Ribbed spiral pipe producing machine |
| 03/08/1989 | EP0305632A1 Improved method of making a heat transfer tube |
| 03/07/1989 | US4810593 High-strength conductors and process for manufacturing same |
| 03/07/1989 | US4809743 Fuel pipe device for motor vehicles and process for producing same |
| 03/07/1989 | US4809423 Making seamless steel pipes |
| 03/07/1989 | US4809415 Method of manufacturing a heat exchange pipe |
| 03/07/1989 | CA1250739A1 Device for continuously manufacturing a spiral wound tubular structure from interlocked metal strip |
| 03/02/1989 | DE3727454A1 Method of manufacturing ribbed tubes |
| 03/01/1989 | EP0305100A1 Security members and structures |
| 02/22/1989 | EP0304267A1 Security members and method of making same |
| 02/21/1989 | US4805693 Multiple piece tube assembly for use in heat exchangers |
| 02/16/1989 | DE3801621C1 Process for producing thick-walled longitudinally seam-welded steel pipes |
| 02/16/1989 | DE3726072A1 Soldering method |
| 02/15/1989 | EP0303074A2 Method and apparatus for making heat exchanger tubes |
| 02/14/1989 | US4803881 Pipe stretching apparatus |
| 02/09/1989 | DE3725092A1 Method and apparatus for the production of a double-walled heat exchanger tube |
| 02/08/1989 | EP0302809A2 Method of manufacture an enhanced heat transfer surface and apparatus for carrying out the method |
| 02/01/1989 | CN1030782A Bonding of halogenated organic compounds |
| 01/31/1989 | US4800744 Production of a taper rod |
| 01/24/1989 | US4800250 Methods and apparatus for manufacturing tubes |
| 01/24/1989 | CA1249121A1 Method for manufacturing bent steel pipe excellent in strength and low-temperature toughness |
| 01/18/1989 | EP0299071A1 Method and device for removing internal burrs inside longitudinally welded pipe |
| 01/17/1989 | US4798076 Nipple forming apparatus |
| 01/11/1989 | CN1030201A Fabrication technology of dual-hole conductive and water cooled copper bus bar |
| 01/10/1989 | US4796798 Method of and apparatus for continuous production of seam-welded metal tubing |
| 01/10/1989 | US4796797 Method for making thin-walled metal pipes |
| 01/10/1989 | US4796693 Finned tube with indented groove base and method of forming same |
| 01/03/1989 | US4795503 Nickel electroplating, oxidation, acid dipping and chemical plating |
| 01/03/1989 | US4795078 Diffusion welding under vacuum-corrosion and wear resistance |
| 01/03/1989 | US4794775 Method of producing a heat transfer tube for single-phase flow |
| 12/28/1988 | CA1247592A Finned heat exchanger tubes and method and apparatus for making same |
| 12/28/1988 | CA1247342A Method of making a fuel channel |
| 12/27/1988 | US4793404 Composite pipe, process for producing the same, and heat pipe using of the same |
| 12/22/1988 | DE3718886A1 Cutting-off arrangement for a pipe, a section bar or the like continuously running out of a production installation |
| 12/21/1988 | EP0295919A2 Cold drawing technique and apparatus for forming internally grooved tubes |
| 12/21/1988 | CN88205286U Machine for composite material tubular products |