The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
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| Number | Title | Issue Date |
| 7325360 | Cable tensioner and window regulator equipped with a cable tensioner A cable tensioner includes two members, such as a pipe and a tube, that define a cable path. The members are helically mobile relative to each other. A retractable detent permits the relative movement of the members in one direction and prevents the relative movemen... | 02/05/2008 |
| 7090454 | Ratchet interlocking housing A fastener, such as a housing, for mounting to a structure, such as a panel, that has an aperture formed therethrough. The fastener includes a shank member and an annular nut member that is configured to align coaxially with the shank member. The shank member is ins... | 08/15/2006 |
| 6439817 | Insert retention mechanism An insert for use in allowing spark plugs, fasteners, couplings for hydraulic fittings and pipe threads of a given dimension to be used in a material.... | 08/27/2002 |
| 6189416 | Stud bolt tool and method of using same A stud bolt tool and method for using the stud bolt tool to install or remove a threaded stud bolt from a threaded blind bore. The stud bolt tool has a cylindrical housing having a first and second surface and an internally threaded bore communicating wit... | 02/20/2001 |
| 5404736 | Attachable vehicle hand brake lock assembly An attachable vehicle hand brake lock assembly capable of being selectively attached over the end of a push button-activated hand brake to prevent its release. The lock assembly includes a cylindrical shaped body designed to be placed longitudinally over ... | 04/11/1995 |
| 5326207 | Safety screw A screw having a threaded shaft, a head on the shaft and means to permit rotation of the screw. There is a longitudinal slot extending along at least a portion of the threaded shaft to receive a locking member. The invention has a particular application i... | 07/05/1994 |
| 5203221 | Shaft mountable gear drive An apparatus is provided for use with a shaft mountable gear reduction drive in which a driven shaft is coupled with reduction gears by a hollow intermediate output shaft. The output shaft is journaled within the gearbox and has a tapered axial passage fo... | 04/20/1993 |
| 4514108 | Retention ring for splined joint A clip for securing inner and outer members of the splined joint against relative axial movement includes a first resiliently supported ear nested within a recess formed on the splined surface of the inner member and contacting an end face of the outer me... | 04/30/1985 |
| 4252167 | Device for positively locking a screw in a tapped hole The device comprises in combination a screwthreaded block and a screw which are hollow and have screwthreads of opposite direction. These screwthreads cooperate with screwthreads of respectively corresponding direction formed in the inner wall of the tapp... | 02/24/1981 |
| 4212491 | Resilient flanged wheel A resilient wheel is provided comprising a hub and web having a rim mated to and resiliently bonded to the web with an elastomeric adhesive. Depending on the application the outer circumference of the rim may have a flange machined into it so that it serv... | 07/15/1980 |
| 4092904 | Means for retaining a piston on a piston rod A piston of a hydraulic actuator is threaded on one end of a piston rod and is prevented from becoming unthreaded therefrom by means of a radially extending key received in a keyway formed by cooperating recesses in the ends of the piston and piston rod. ... | 06/06/1978 |
| 4037980 | Pump coupling Locking device locking the suspension nut of a driven shaft from rotation relative to the shaft, upon reversal in the direction of rotation of the shaft or such vibration as would loosen an ordinary nut. The locking device is particularly adapted for cant... | 07/26/1977 |
| 4000753 | Means for locking replaceable nozzles to fire hydrants A fire hydrant either of the "wet" barrel type or the "dry" barrel type having an improved hydrant nozzle construction. The barrel of the fire hydrant is provided with an internally threaded boss for receiving a replaceable externally threaded nozzle. Mea... | 01/04/1977 |