| 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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| 07/26/1977 | US4037445 Method and apparatus for production of multiple gauge strip |
| 06/28/1977 | US4031745 Method of forming constriction in tubing |
| 06/28/1977 | US4031602 Method of making heat transfer tube |
| 06/14/1977 | US4029129 Helical pipe lock seam |
| 06/14/1977 | US4028785 Tubular products |
| 06/07/1977 | US4027511 Apparatus for producing multiple elongated products such as wires |
| 05/24/1977 | US4025035 Method of affixing surface enlarging members in the form of coherent, transversally corrugated metal strips to elongate metal basic profiles |
| 05/24/1977 | US4024619 Method of manufacturing a flat heat-exchanger tube from thin, flexible metal strip material |
| 05/17/1977 | US4023989 Method for producing corded steel wire |
| 04/26/1977 | US4020312 Method of manufacturing thick, high-strength steel pipe for low temperature service |
| 04/19/1977 | US4018634 Method of producing high strength steel pipe |
| 04/19/1977 | US4018397 Unfurling device for tubular extendible structures |
| 04/19/1977 | US4018376 Process for obtaining skeins of wire rod of a weight which is a multiple of that of a wirebar |
| 04/05/1977 | US4016393 System for laying pipe |
| 04/05/1977 | US4016008 Clad metal tubes |
| 04/05/1977 | US4015459 Hydrodynamic drawing of multiple gauge metal strip |
| 04/05/1977 | US4015321 Welded pipe fitting and method of making same |
| 03/08/1977 | US4011109 Method for producing steel filaments |
| 02/22/1977 | US4008596 Apparatus for transforming the cross-section of a thin-walled cylinder |
| 02/15/1977 | US4007616 Cylindrical containers by hour glass formation of metal tubes |
| 02/08/1977 | US4006622 Continuous process for the production of very long precision tubes and installation for carrying out the process |
| 02/08/1977 | US4006520 Machine for connecting workpieces, especially pipe bend segments or the like |
| 02/01/1977 | US4005591 Ball sizing machine and method |
| 01/25/1977 | US4004441 Process for modifying capillary grooves |
| 01/18/1977 | US4003492 Container body side seam construction |
| 01/04/1977 | US4001054 Process for making metal pipe |
| 12/21/1976 | US3999029 Fin to tube welding by high frequency current source |
| 12/21/1976 | US3998601 Thin foil |
| 12/14/1976 | US3997098 Helically seamed tubing and apparatus and method for making same |
| 12/14/1976 | US3996783 Method and apparatus for reforming round ducts into rectangular ducts |
| 11/30/1976 | US3994753 Stop-weld composition and method for producing aluminium tube in sheet utilizing the same |
| 11/16/1976 | US3992172 Separator arrangement for start-up system |
| 11/16/1976 | US3991822 Metal tube having internal passages therein |
| 11/16/1976 | US3991597 Method and device for adjusting forming rolls in a helical seam pipe mill |
| 10/19/1976 | US3986654 Method for making tubular members and product thereof |
| 10/19/1976 | US3986470 Method and means for straight line manufacture of sheet metal duct elements |
| 10/19/1976 | US3986240 Method of making sphere-passing tees for piping systems |
| 10/12/1976 | US3985054 Cutting mechanism |
| 10/05/1976 | US3983897 Pipe connection means for the connection of crosswisely extending pipes to a longitudinally extending transport pipe |
| 10/05/1976 | US3983735 Cleat forming method and machine |
| 09/28/1976 | US3982457 Notching machine |
| 09/28/1976 | US3982414 Machine for making corrugated flexible cylindrical duct |
| 09/14/1976 | US3979818 Method of thermally insulating pipe |
| 09/14/1976 | US3979809 Pipe elbow and method of making same |
| 09/07/1976 | US3979231 Method for producing large diameter steel pipes |
| 08/31/1976 | US3977228 Tool for forming pipe from sheet metal |
| 08/31/1976 | US3977070 Method of continuously producing fine metal filaments |
| 08/10/1976 | US3973717 Bushing fabrication |
| 08/10/1976 | US3973424 Production of corrugated tubing |
| 08/03/1976 | US3972432 Method for rotationally positioning a welded steel pipe in response to a seam section thereof and an apparatus for positioning the same |
| 07/20/1976 | US3970910 Weld tracking mechanism |
| 07/20/1976 | US3970233 Machine and a method for fabricating a helicoidal tube |
| 07/13/1976 | US3969156 Method of making dispersion strengthened products |
| 07/13/1976 | US3969155 Production of tapered titanium alloy tube |
| 07/13/1976 | US3968554 Heat exchanger |
| 07/06/1976 | US3967489 Method of forming constriction in tubing |
| 06/29/1976 | US3965551 Production of polymer-coated steel tubing |
| 06/22/1976 | US3964283 Production of multiple elongated products such as wire |
| 06/15/1976 | US3963514 Removal of excess metal from the welding seam in the interior of a pipe |
| 06/08/1976 | US3961741 Heat transfer tubes with internal extended surface |
| 06/08/1976 | US3961513 Method of making pipe fittings |
| 06/01/1976 | US3960308 Apparatus for affixing surface enlarging members in the form of coherent transversally corrugated metal strips to elongate metal basic profiles |
| 05/04/1976 | US3953993 Multiple size culvert pipe rolling machine |
| 04/27/1976 | US3953250 Method for producing wire with a small cross-sectional area |
| 04/27/1976 | US3952571 Method of manufacturing aluminum conductor wires |
| 04/20/1976 | US3950978 Stretch-forming of long tubes |
| 04/06/1976 | US3948614 Composite metal sheetings |
| 04/06/1976 | US3947947 Conduit making machine, and method of making an article made thereby |
| 04/06/1976 | US3947941 Method of making a heat exchanger |
| 03/23/1976 | US3945555 Production of beryllium reinforced composite solid and hollow shafting |
| 03/16/1976 | US3944775 Welding process |
| 03/16/1976 | US3943619 Procedure for forming small wires |
| 03/09/1976 | US3942352 Method of making seamless metal tubes |
| 03/02/1976 | US3941296 Process for manufacturing flexible tubing capable of withstanding substantial pressures and flexible metal tubing made thereby |
| 03/02/1976 | US3941087 Resin coated steel pipe and the process and equipment for its production |
| 03/02/1976 | US3940965 Method and apparatus for forming corrugating pipe |
| 03/02/1976 | US3940964 Method for making a clad wire for an electric contact |
| 03/02/1976 | US3940962 Conduit making machine with diameter control and method |
| 02/24/1976 | US3939683 Piercing tools |
| 02/17/1976 | US3938558 Flexible cylindrical metal tube |
| 02/17/1976 | US3938374 Tool for forming internal threads |
| 01/27/1976 | US3934446 Methods of and apparatus for production of wire |
| 01/27/1976 | US3934324 Method and apparatus for forming automotive wheel rim blanks |
| 01/13/1976 | US3931787 Apparatus for applying solid particle material to a strip |