| Patents for F16B 23 - Specially-shaped heads of bolts or screws for rotations by a tool (3,038) |
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| 07/25/1990 | EP0378790A1 Assembly element with a threaded connecting part |
| 07/12/1990 | WO1990007653A1 Drive-head lock washer |
| 07/03/1990 | US4938731 Rotatable, self-aligning lobe coupling |
| 07/03/1990 | US4938108 Theft-resistant fastener system |
| 06/26/1990 | US4936728 Curtain and window hardware having threaded engagement members |
| 06/26/1990 | US4936172 Interlocking screw and screwdriver |
| 06/13/1990 | DE3841137A1 Adjusting device |
| 06/05/1990 | US4930960 Mounting arrangement for electrical wiring devices having non-metallic mounting strap |
| 03/27/1990 | US4911593 Ratchet driven threaded fasteners |
| 03/13/1990 | US4907928 Fastening member for securement into hard materials |
| 03/06/1990 | US4905547 Master key for wheel cover lock bolts or nuts |
| 02/27/1990 | US4903746 Adaptor disk for attaching an anti-skid device to a wheel disk or rim |
| 01/30/1990 | US4897008 Anti-tamper nut |
| 12/05/1989 | US4884933 Adaptor for screwheads and the like |
| 11/30/1989 | DE3921874A1 Screw with a countersunk recess in the head, a right-handed and a left-handed thread being located on the inner wall of said recess. Screwdriver with complementary threads on the outer border of the part which is screwed into the countersunk recess in order to screw in, and unscrew, the screw |
| 11/21/1989 | USRE33114 Tamper-proof threaded fastenings |
| 11/21/1989 | US4881316 Process for setting a threaded torque-limited collar and pin joint |
| 11/07/1989 | US4878794 Collated screw fasteners |
| 10/25/1989 | EP0338973A2 Fastener with guiding washer |
| 10/19/1989 | WO1989009886A1 Tamper-resistant rotary fasteners and tools for use with them |
| 10/05/1989 | WO1989009030A1 Bone screw |
| 09/28/1989 | DE3808534A1 Configuration of a screwing element, in particular of the head of a screw, and of the appertaining actuating tool |
| 09/26/1989 | US4869633 Locking lug nut for wheels and tires |
| 09/21/1989 | WO1989008790A1 Cap screw with socket head intended for an internal drive |
| 09/21/1989 | DE3807741A1 Kopfschraube mit einer fuer einen innenantrieb vorgesehenen senkung Head screw with a drive for an internal envisaged reduction |
| 09/07/1989 | DE3905539A1 Remote-control device for blocking a bracing screw |
| 08/22/1989 | US4858299 Process for making a joint with a torque-limited collar |
| 08/15/1989 | US4856953 Hook-driven screw with replaceable hook |
| 07/26/1989 | EP0324914A1 Fastening of a roof luggage carrier to a motor car |
| 05/30/1989 | US4833830 Hatch closure assembly |
| 05/23/1989 | US4832556 Coupling apparatus |
| 05/18/1989 | DE3737591A1 Screw/dowel combination |
| 05/17/1989 | EP0316272A1 Fastening element for driving into hard materials |
| 05/09/1989 | US4827811 Tamper-resistant fastener and tool for operating same |
| 04/27/1989 | DE3834285A1 Screw hook |
| 04/18/1989 | US4822227 Flush mounted bolt |
| 04/18/1989 | US4821877 Screw magazine for an apparatus for inserting and removing screws |
| 03/28/1989 | CA1251665A1 Threaded fastener and method of installing same |
| 03/07/1989 | US4809569 Anti-theft system for articles secured by recessed socket head threaded fasteners |
| 02/15/1989 | EP0166725B1 An improved windshield wiper material |
| 01/31/1989 | US4800787 System to install a vandal-resistant screw |
| 01/26/1989 | DE3723443A1 Safety screw and tool |
| 12/27/1988 | US4793752 Drive-head lock washer |
| 12/15/1988 | WO1988009708A1 Screw tool and screws usable therewith |
| 12/13/1988 | CA1246360A1 Fastening element for securing packing sheets |
| 11/15/1988 | US4784549 Torque-limited collar |
| 11/09/1988 | EP0289650A2 Fastener head with stabilizing ring |
| 11/02/1988 | EP0143826B1 Improved high torque fastener and driving tool |
| 10/26/1988 | EP0287702A1 Security device for motor vehicle wheels |
| 10/25/1988 | CA1243518A2 High torque fastener and driving tool |
| 10/25/1988 | CA1243517A1 High torque fastener and driving tool |
| 08/04/1988 | DE3701574A1 Screw head with slot |
| 07/27/1988 | EP0276153A2 Bone screw |
| 07/26/1988 | US4759672 Fastener head with stabilizing ring |
| 07/26/1988 | US4759237 Self-locking nut and tightening tool |
| 07/12/1988 | US4756653 Fastening element for securing packing sheets |
| 07/06/1988 | EP0273078A1 Bolt with recessed top |
| 06/15/1988 | EP0271305A1 Laminated nut with one way installation |
| 05/31/1988 | CA1237304A1 Screw with filler-receiving head |
| 05/11/1988 | EP0266888A1 Bolts and drivers |
| 05/10/1988 | US4742702 Anti-theft device for a wheel lug nut |
| 03/30/1988 | EP0261232A1 Torque limiting fastener. |
| 03/02/1988 | EP0257664A1 Internal drive, covering cap and screwdriver for a universal screw |
| 02/23/1988 | US4726723 Multi-part locknut construction |
| 02/03/1988 | CN87207916U Screw coupling |
| 01/20/1988 | EP0253496A1 Security wheel nut or bolt |
| 11/04/1987 | CN87204853U 单向螺钉 One-way screws |
| 10/29/1987 | DE3711908A1 Leitfaehiges verbindungsteil Conductive connecting part |
| 10/27/1987 | US4701993 Method of installing threaded fastener |
| 10/08/1987 | WO1987005977A1 Torque limiting fastener |
| 09/30/1987 | CN86106974A Anti-skid device, particularly for motor vehicles with pneumatic tyres on ice and snow surfaces, as well as adaptor for screwheads and like |
| 09/15/1987 | US4693655 Anti-theft device for vehicle wheels (geared oval nut) |
| 09/01/1987 | US4690298 Remotely-handled replaceable component |
| 08/18/1987 | US4686874 Tamper-proof bolt and tamper-proof bolt-key combination |
| 08/12/1987 | EP0231218A1 Anti-theft bolt |
| 08/11/1987 | US4685848 Gear headed fastener and drive tool structure |
| 06/23/1987 | US4674367 Apparatus for inserting and removing screws |
| 06/23/1987 | US4674306 For use on a bicycle |
| 06/09/1987 | US4670927 Method and apparatus for forming the head of a high torque fastener |
| 04/23/1987 | DE3537141A1 Screw-screwdriver system with conical groove |
| 03/31/1987 | US4653486 Fastener, particularly suited for orthopedic use |
| 03/18/1987 | EP0214623A2 Fixing of locking screws to wheel bolts |
| 03/10/1987 | US4648293 Locknut and key therefor |
| 02/10/1987 | US4642010 Threaded fastener and method of installing same |
| 01/29/1987 | WO1987000593A1 Anti-theft bolt |
| 01/20/1987 | US4637764 Bolt adapted for one-handed tightening by tightening tool |
| 12/30/1986 | EP0206564A1 Screw driving socket |
| 12/02/1986 | US4625599 Half-inch lug lock key |
| 11/26/1986 | CN86101574A Torque-limited collar, joint, process for setting the joint, and driver |
| 11/12/1986 | CA1213763A Tool gripping fastener |
| 10/21/1986 | US4618299 Locknut and key therefor |
| 10/14/1986 | US4616535 Tamper-proof threaded fastenings |
| 10/07/1986 | US4616060 Windshield wiper material |
| 09/23/1986 | US4613265 Screw with filler-receiving head |
| 08/27/1986 | EP0192203A1 Collar, process for setting the joint, and driver |
| 08/26/1986 | US4607547 In association with a gripper mechanism for the head of a bolt |
| 07/24/1986 | EP0166725A4 An improved windshield wiper material. |
| 06/18/1986 | CN85202600U Screw with a "y" form slot on its head and its special screwdriver |
| 05/27/1986 | US4590825 High torque fastener and driving tool |
| 05/20/1986 | US4589154 Method and apparatus for forming the head of a high torque fastener |