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| Number | Title | Issue Date |
| 5174027 | Arrangement in a grass trimmer The cutting height of a grass trimmer is determined by the location of an eyelet (19) through which the cutting thread (16) extends from the coil (15) of the trimmer. According to the invention the eyelet is provided in an insert (21) accommodated in a ho... | 12/29/1992 |
| 4165784 | Casing perforator The present invention involves a tool for connection to a conventional drill string and operation therewith for punching holes in a standard casing located within a well bore to pass water or gas therethrough for recovery at the well bore surface, the inv... | 08/28/1979 |
| 4033229 | Tool for enlarging the bore in a workpiece For enlarging the bore in a workpiece, the present invention provides a collar that can be secured to the workpiece with a plate rotatably mounted on the collar. A handle supports a housing in which a cutting tool is rotatably positioned. The cutting tool... | 07/05/1977 |