| Patents for B21H 3 - Making helical bodies or bodies having parts of helical shape (2,057) |
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| 10/03/1989 | US4870848 Tapered rolled thread bar joint |
| 09/05/1989 | US4862718 Thread rolling dies |
| 08/24/1989 | DE3804291A1 Clamping screw |
| 07/27/1989 | DE3801000A1 Clamping and adjusting device for the fixed tool holder of thread-rolling machines |
| 07/18/1989 | CA1257455A2 Die for thread forming on a workpiece having different size diameters |
| 07/05/1989 | EP0323429A1 Bone plate locking screw and its fabrication process |
| 06/13/1989 | US4838066 Process and a device for the production of grooves on a wall of revolution |
| 05/17/1989 | CN2037650U Bit-rollng machine |
| 05/16/1989 | US4829800 Method and apparatus for cold sizing a round workpiece having multiple diameters |
| 05/03/1989 | CN1004096B Method and rolling flat die for manufacturing screw with groove for self-lock |
| 04/26/1989 | CN2036459U Rolling mold for working female screw groove |
| 04/20/1989 | DE3734123A1 Method for the production of a thread on a ball journal and for smoothing or hardening the surface of the ball journal and an apparatus for carrying out the said method |
| 04/12/1989 | EP0310898A1 Apparatus for rolling threads or similar profiles |
| 04/11/1989 | US4819469 Method for rolling tapered threads on bars |
| 04/04/1989 | CA1251962A1 Threaded fastener having minimized length and weight and method to make it |
| 03/28/1989 | US4816346 Screw fastener blank |
| 03/28/1989 | US4815909 Wood screw and method for making same |
| 03/15/1989 | CN2034177U Roller reversing wheel |
| 02/01/1989 | CN2031726U Device for cold-rolling wire thread |
| 02/01/1989 | CN2031725U High-speed screw rolling machine |
| 01/24/1989 | US4799372 Process for forming helical screw threads having a flank with zero or negative inclination |
| 01/17/1989 | US4798070 Combined thread rolling dies |
| 01/11/1989 | CN2030513U Y-shaped cold-rolled screw wire machine |
| 01/03/1989 | US4794821 Method of roll forming a skip threading tap |
| 12/28/1988 | EP0296594A2 Method and device for mutual aligning of forming rollers |
| 12/28/1988 | CA1247309A Threading and projection forming on different size diameter |
| 12/27/1988 | US4793220 Method of making a drill-shaped cutting tool and thread rolling dies |
| 12/27/1988 | US4793219 Method of manufacturing non-slip thread rolling dies |
| 12/21/1988 | CN88200359U Thread rolling equipment of a large central angle arch type rubbing board |
| 11/29/1988 | US4787229 Method of rolling a pipe by flat cutters |
| 11/22/1988 | US4785649 Tapered thread roll-forming machine |
| 11/16/1988 | CN87216874U Dies for forming thread steel by rolled cold-draw |
| 11/08/1988 | US4782688 Rolling flat die for manufacturing a screw with groove for self-locking |
| 11/08/1988 | US4782681 Method of rolling a screw with groove for self-locking |
| 11/01/1988 | US4781501 Self-plugging blind fastener |
| 10/05/1988 | EP0284824A2 Method and apparatus for cold sizing a round workpiece having multiple diameters |
| 10/04/1988 | CA1242601A1 Assymetrically shaped thread forming screw and method of making same |
| 09/21/1988 | EP0282889A2 Thread rolling on the conical end of a tapered bar |
| 09/20/1988 | US4771625 Apparatus for forming tapered threads on pipes |
| 09/20/1988 | US4771623 For forming a spline such as a universal joint member |
| 08/30/1988 | US4766750 Control mechanism for thread rolling attachment |
| 08/23/1988 | US4765010 Method of making a stem for a self-plugging blind fastener |
| 08/16/1988 | US4764067 Screw with groove for self-lock and method and rolling flat die for manufacturing the same |
| 07/20/1988 | EP0274719A2 Thread-forming method and tubular body provided with a thread |
| 07/05/1988 | US4754631 Flat die thread roller |
| 06/29/1988 | CN85104710B Heat transfer tube used for uniphase flow |
| 06/01/1988 | DE3639532A1 Method for the production of hot-dip galvanised parts with a thread |
| 04/12/1988 | US4736481 Method of manufacturing screw fasteners |
| 04/05/1988 | US4735537 Thread rolling and fastener |
| 03/23/1988 | CN86101306B Rolling machine for tapping tube |
| 03/08/1988 | US4729232 Machines for pressure forming surface configurations on a rotary workpiece |
| 03/02/1988 | CN87102268A High speed thread roller |
| 02/24/1988 | EP0256830A2 Machines for forming configurations on a rotary workpiece |
| 02/16/1988 | US4724694 Method of manufacturing a thread-forming screw |
| 02/10/1988 | CN86104930A Rolling technology of twist drill rods |
| 02/02/1988 | US4722107 Methods and apparatus for making screws having a drill section and a reamer section |
| 01/27/1988 | EP0254533A2 Method and apparatus for roll forming interrupted threading taps |
| 01/05/1988 | US4716751 Non-slip thread rolling dies |
| 12/22/1987 | US4713954 Thread rolling dies |
| 12/22/1987 | CA1230455A1 Combined thread rolling dies |
| 12/15/1987 | US4712410 Method and apparatus for cold sizing a round workpiece having multiple diameters |
| 12/15/1987 | US4712409 Threading and projection forming on different size diameters |
| 12/15/1987 | US4712407 Apparatus for working surface of metal pipe |
| 12/08/1987 | CA1229958A1 Thread rolling dies for forming self tapping screws and the like |
| 11/17/1987 | US4706483 Method and device for finishing by burnishing of a helical thread cut on a cylindrical component |
| 10/21/1987 | EP0151590B1 A security system for safes |
| 10/20/1987 | CA1228254A1 Method and apparatus for cold sizing a round workpiece having multiple diameters |
| 10/19/1987 | EP0166758A4 Threading and projection forming on different size diameters. |
| 10/07/1987 | CN86102152A Method for grinding roll-for rolling the bit spirally and longitudinally |
| 09/08/1987 | US4691551 Rolling method and rolling tools |
| 09/01/1987 | US4689984 Method for producing male conical threads |
| 08/11/1987 | CA1225264A2 Self thread creating fastener |
| 08/06/1987 | DE3632260A1 Method and apparatus for the production of helical toothing by cold forming |
| 08/05/1987 | CN86106864A Method and rolling flat die for manufacturing screw with groove for self-lock |
| 07/21/1987 | CA1224306A1 Cut-off style, roll thread flat dies |
| 07/07/1987 | US4677837 Flat die thread roller |
| 06/10/1987 | EP0225262A1 Method of creating helical threads with zero or negative side inclination |
| 06/10/1987 | EP0225003A1 Screw with groove for self-lock |
| 05/19/1987 | US4666348 Cutter for thread rolling dies |
| 04/22/1987 | EP0219019A2 Apparatus for plastic cross-rolling porous sintered metallic work pieces presenting a rotational symmetry |
| 04/21/1987 | US4659267 Prefastenable torque-shear bolt |
| 04/14/1987 | US4656723 Method of forming screw thread on crankshaft and the like |
| 04/08/1987 | EP0217074A2 Thread-rolling die and a screw produced therewith |
| 04/08/1987 | CN86104936A Thread forming and improved fastener |
| 04/07/1987 | US4655073 Thread rolling die for self-tapping screw |
| 03/31/1987 | US4653132 Method of making plug-containing type internally threaded anchor |
| 03/31/1987 | CA1219935A1 Security system for safes |
| 03/18/1987 | CN85106448A Forming machine with multiple operating positions |
| 03/17/1987 | US4649833 Security system for safes |
| 03/11/1987 | CN86101528A Method for roll forming of a screw tap having interval thread |
| 01/31/1987 | CN86102147A Semi-automatic rolling tool for external thread |
| 01/21/1987 | EP0209305A2 Method and apparatus for making screws having a drill section and a reamer section |
| 01/20/1987 | US4637767 Threaded fastener |
| 01/06/1987 | US4633696 Thread rolling method |
| 12/30/1986 | US4631947 Thread rolling dies |
| 12/24/1986 | CN85104710A Heat transfer tube used for uniphase flow |
| 11/19/1986 | CN86101306A Rolling machine for tapping tube |
| 11/05/1986 | EP0199825A1 Method of manufacturing a self-drilling screw |
| 10/21/1986 | US4617816 Thread rolling attachment |
| 10/15/1986 | EP0197129A1 Thread rolling and improved fastener |