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| All Patents in class 415/904 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,452,268 | Oct. 26, 1948 | R. Schümann | Motor Hand Tool Assembly | handheld grinders | |
| 2,923,306 | Feb. 02, 1960 | W.G. Mitchell | Pressure regulator valve mechanism for air tools | ||
| 3,934,657 | Jan. 27, 1976 | I.R. Danielson | Dual safety control means for a power tool | ||
| 5,383,771 | Jan. 24, 1995 | R.D. De Rome, T.J. Diedrich, A.P. Ghode | Air Motor with Offset Front and Rear Exhausts | ||