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| Number | Title | Issue Date |
| 5099933 | Drill bit for drilling along arcuate path A drill bit for drilling holes around the corner of a workpiece is provided with a single rounded continuous cutting edge with radiused upper and lower corners to permit free rotation of the cutting head as it is urged along an arcuate path. The bit is of... | 03/31/1992 |
| 5018912 | Drilling jig for stair rails A drilling jig for staircase rails includes a base plate having a first block fixed thereto and a second block adjustably mounted thereon. Rotatably adjustable drill guides with bushings are provided on the first and second blocks to permit adjustment of ... | 05/28/1991 |
| 4948304 | Adjustable tool guide and driver for a bit A drive tool for a bit including a support portion for supporting a drive article which has an upper part and a lower part of a drive shaft equipped with a handle and a holding part of the bit respectively, a base frame on which the support portion is cou... | 08/14/1990 |
| 4865496 | Boring jig apparatus A jig used for precision boring of holes in a working surface of an elongate work piece includes a pair of mounting plates and an elongate connecting member for mounting the plates together in adjustable, spaced positions such that the plates face each ot... | 09/12/1989 |
| 4729698 | Multi-purpose and versatile portable power tool A portable electric power tool constituted by two cooperating main components, namely, a power head of predetermined exterior cross-sectional shape and a sleeve with interior surfaces mating to the power head to afford relative sliding movement, but not r... | 03/08/1988 |
| 4582105 | Work stand for electrically powered machines A work stand for power operated tools such as, for example, an electrically powered hand drill, with the work stand including a supporting bracket adjustable along a guide column, a guide plate pivotable about a horizontal axis at the supporting bracket, ... | 04/15/1986 |
| 4391558 | Drill jig A drill jig includes a frame adapted for mounting on a work surface, and a guide for guiding a drill bit to various positions on the work surface and along mutually orthogonal axes for boring a hole having its major axis aligned at any desired angle relat... | 07/05/1983 |
