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| All Patents in class 418/86 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,489,887 | Nov. 29, 1949 | C.R. Houghton | Rotary pump | rotary pumps | |
| 2,545,453 | Mar. 20, 1951 | F.P. Forss | Portable rotary grinder or die filer | handheld power tools | |
| 5,383,771 | Jan. 24, 1995 | R.D. De Rome, T.J. Diedrich, A.P. Ghode | Air Motor with Offset Front and Rear Exhausts | ||