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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 7334961 | Internally disposed linear fastener system A linear locking set screw system capable of rapid linear engagement and disengagement includes a threaded outwardly expandable set screw and an expander member which are constructed and arranged to thread easily into a threaded aperture while in a first release pos... | 02/26/2008 |
| 7329076 | Hole location gauges and methods The present invention provides devices and methods for indicating or gauging the position of one or more holes in a workpiece. In one aspect of the present invention reusable devices that can be removably engaged with a bore or tapped hole in a workpiece for accurat... | 02/12/2008 |
| 6908271 | Split lock screw fastener assembly and method A self-locking bolt assembly (1) includes a split bolt (2) and a screw set pin (3). The bolt includes a threaded shank (4), an axial bore (6) extending through the shank, the bore (6) including a threaded bore section (6 | 06/21/2005 |
| 5221167 | Security head anchor An improved pin drive anchor has an elongated body, a lock nut, and a drive pin having a securing section. The outer end of the body is threaded to permit the lock nut to be threadable therein. When the drive pin is driven into the anchor, the security se... | 06/22/1993 |
| 5219254 | Expandable fastener and locking means therefor A fastener assembly for use in locking relationship with an internally threaded member is disclosed which includes an expandable bolt having a cavity extending longitudinally therethrough which is cylindrically shaped on a first end segment thereof and fr... | 06/15/1993 |
| 4976577 | Locking bolt assembly A locking bolt assembly that prevents the release of loose parts in the event of bolt failure. A bolt having a head and threaded main body portion is provided with a central bore through the head and main body portion. The central bore has a necked down a... | 12/11/1990 |
| 4822225 | Screw for easily engaging the internal thread of a tapped hole The screwed shank (2) of a screw (1) is divided into two halves (4, 5) by a slot (3) running centrally in longitudinal direction and two chamfers (7) running vertically to the slot (3) are provided on both long sides of the screwed shank (2). The screwed ... | 04/18/1989 |
