| Patents for F16B 23 - Specially-shaped heads of bolts or screws for rotations by a tool (3,038) |
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| 04/20/1993 | US5203742 Punch for making such screw heads with slant rib |
| 04/20/1993 | US5203657 Self-tapping screw |
| 04/06/1993 | US5199839 Fastener screw having improved installation and self-locking characteristics |
| 03/18/1993 | DE4131110A1 Short-threaded screw fastener for wood and composite material - has threaded lower end of shaft with double grip profile in head for securing tool |
| 03/18/1993 | DE4130285A1 Threaded nut for high torque release - has circular head with radial slots gripped by similar shaped ring spanner |
| 03/10/1993 | EP0261232A4 Torque limiting fastener |
| 03/03/1993 | CN1019960C Apparatus and method for mounting vehicle wheels |
| 03/02/1993 | US5190392 Robot-friendly connector |
| 03/02/1993 | US5190308 Apparatus for securing active and/or passive element to the wall of composite components |
| 02/24/1993 | CN1069322A Screw head with slant rib and punch for making such screw heads |
| 02/18/1993 | WO1993003284A1 Screw head with slant rib and punch for making such screw heads |
| 02/18/1993 | WO1993003283A1 Toothed fastener |
| 02/18/1993 | CA2114549A1 Toothed fastener |
| 02/11/1993 | DE4126539A1 Bolt and spanner set - has bolt head and spanner contoured to prohibit use with normal spanner |
| 01/27/1993 | EP0524617A1 Screw head driving geometry |
| 12/29/1992 | US5174704 Bolt head and socket for the same |
| 12/15/1992 | US5171117 Fastener with multilobular internal recess and tool entry ramps |
| 12/15/1992 | CA1311380C Fastening element with guide member |
| 12/10/1992 | WO1992021888A1 Compressible screw-type locking mechanism |
| 12/08/1992 | US5169400 Bone screw |
| 12/08/1992 | US5169270 Compressible screw-type locking mechanism |
| 12/02/1992 | EP0516431A1 Drilling screw |
| 12/02/1992 | EP0516430A1 Drilling screw |
| 12/02/1992 | EP0516429A1 Drilling screw |
| 10/20/1992 | US5156887 Method for injecting a chemical barrier into a surface aperture |
| 09/22/1992 | US5148727 Installation tool for locking fasteners and method of use |
| 09/08/1992 | US5145302 Screws |
| 09/08/1992 | US5145300 Deformable locking fastener and method of use |
| 09/02/1992 | EP0501860A1 Screw, in particular screw with hollow shaft of the screwplug type for soft material |
| 08/18/1992 | US5138986 Internal combustion engine starting control to prevent unauthorized starting |
| 08/12/1992 | EP0498693A1 Screw for anti-theft device and anti-theft device |
| 08/11/1992 | US5137407 Head drive for threaded fastener |
| 06/10/1992 | CN1061839A Recessed screw and driver bit engageable therewith |
| 06/09/1992 | US5120173 Screw head with slant rib |
| 06/03/1992 | EP0488541A1 A recessed screw and a driver bit engageable therewith |
| 05/27/1992 | EP0487440A1 Industrial lock and key therefor |
| 05/27/1992 | CA2054866A1 Recessed screw and a driver bit engageable therewith |
| 05/26/1992 | CA1301608C Anti-skid device, particularly for motor vehicles with pneumatic tyres on ice and snow surfaces, as well as an adaptor for screwheads and the like |
| 05/21/1992 | DE4036267A1 Buttonhole screw with screw driver - has two or more holes punched out of side and has self cutting pins |
| 05/12/1992 | US5112176 Shrouded anti-theft locknut |
| 05/06/1992 | EP0483340A1 Lock and hexagonal nut combination for mounting vehicle wheels |
| 04/30/1992 | WO1992007197A1 Plastic screw accessory |
| 04/29/1992 | EP0482070A1 Chemical composition, and methods of constructing and utilizing same |
| 04/16/1992 | WO1992005918A1 Fastening system |
| 03/31/1992 | CA1298265C Article to secure a pipe to a wall |
| 03/25/1992 | EP0476158A1 Extended grip range fastener and driver |
| 03/24/1992 | US5098239 Cover cap for a hexagonal recess |
| 03/24/1992 | CA1297709C Laminated nut with one way installation |
| 03/11/1992 | EP0474614A2 Screw and screwdriver therefor |
| 02/18/1992 | CA2023573A1 Extended grip range fastener and driver |
| 01/30/1992 | DE4031363A1 Drill bolt for simple power tool application - has take=up shaft with break-off recess giving secure bolt location under high thread bending force |
| 01/14/1992 | CA1294156C Fastener head with stabilizing ring |
| 12/18/1991 | EP0461465A1 Device for fastening of active and/or passive elements on the wall of composite components |
| 12/11/1991 | CN1056841A Lock and hexagonal mut combination for mounting vehicle wheels |
| 12/06/1991 | CA2043404A1 Screws |
| 11/12/1991 | US5064326 Tamper proof service bolt |
| 11/05/1991 | US5062895 Chemical composition, and methods of constructing and utilizing same |
| 11/05/1991 | US5062843 Interference fixation screw with integral instrumentation |
| 11/02/1991 | WO1991017364A1 Lock and hexagonal nut combination for mounting vehicle wheels |
| 10/16/1991 | EP0451140A1 Drive-head lock washer |
| 10/03/1991 | WO1991014602A1 Internal combustion engine starting control to prevent unauthorized starting |
| 08/27/1991 | CA1287991C Torque-limited collar, joint, process for setting the joint, and driver |
| 08/22/1991 | WO1991012438A1 Locking and unlocking arrangement for a screw or nut device, particularly a theft prevention screw or nut on a vehicle wheel |
| 08/21/1991 | EP0442629A1 Drive system for prosthetic fasteners |
| 08/14/1991 | EP0441065A2 Interference fixation screw with integral instrumentation |
| 08/14/1991 | CN2082788U Theft-poof screw |
| 08/08/1991 | CA2035649A1 Interference fixation screw with integral instrumentation |
| 08/06/1991 | US5037260 Lock and hexagonal nut combination for mounting vehicle wheels |
| 06/11/1991 | US5022560 Spigot and wrench combination for a beverage dispenser |
| 06/05/1991 | EP0430563A1 Threaded fastener |
| 06/05/1991 | CA2029365A1 Anti-theft device for automotive audio equipment |
| 06/04/1991 | US5020954 Screw driving socket |
| 05/29/1991 | CN2077927U Portable hexagon bolts |
| 05/28/1991 | US5019080 Drive system for prosthetic fasteners |
| 05/28/1991 | US5019079 Bone screw |
| 05/28/1991 | US5018921 Locking screw for modular framework |
| 05/21/1991 | US5017079 Laminated nut with one way installation |
| 05/21/1991 | US5017069 Sleeve bolt |
| 05/21/1991 | US5017068 Plastic screw accessory |
| 05/07/1991 | US5012704 Ball driver for a threaded collar |
| 04/11/1991 | DE3932811A1 Screw head with screw spanner - has two circular or cylindrical recesses which are non concentric and eccentrically arranged in head |
| 04/02/1991 | US5004361 Fastener for use at cryogenic temperatures, and tool therefor |
| 03/19/1991 | US5000640 Of cylindrical threaded shaft |
| 03/19/1991 | US5000067 Lock for trailer hitch |
| 03/05/1991 | US4997117 Fastening arrangement of a roof luggage carrier at a motor vehicle |
| 01/21/1991 | WO1991001201A1 Chemical composition, and methods of constructing and utilizing same |
| 01/21/1991 | CA2063805A1 Chemical composition, and methods of constructing and utilizing same |
| 01/16/1991 | EP0407856A2 Countersunk head screw |
| 01/16/1991 | EP0407434A1 Bone screw. |
| 11/28/1990 | CN2066373U Screw and screw driver |
| 10/24/1990 | CN1010117B Torque-limited collar, joint, process for setting the joint and driver |
| 10/23/1990 | US4964602 Support device |
| 10/16/1990 | US4963144 Bone screw fixation assembly, bone screw therefor and method of fixation |
| 10/16/1990 | US4962651 Anti-theft device for automotive audio equipment |
| 10/11/1990 | DE3911409A1 Screw and screwdriver combination |
| 09/19/1990 | EP0387392A2 Bone screw fixation assembly, bone screw therefor and method of fixation |
| 09/05/1990 | CN1009445B Anti-skid device for motor vehicles with special connector |
| 08/21/1990 | US4950270 Cannulated self-tapping bone screw |
| 08/14/1990 | US4948312 Fastening element with guide member |
| 07/26/1990 | WO1990008267A1 Engaging and interlocking notches for all types of turnable objects |