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| All Patents in class 81/429 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,460,408 | Aug. 12, 1969 | J.G. Raymond | Depth gauge | handheld power drills | |
| 3,527,273 | Sep. 08, 1970 | R.C. Falter | Adjustable means of limiting driving depth with attachable nosepiece | handheld power drivers | |
| 3,686,983 | Aug. 29, 1972 | A. Flagge | Torque applying and tension controlling device | ||