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| All Patents in class 418/270 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,539X | Mar. 23, 1836 | D. Ulam | Rotary steam engine | rotary steam engines | |
| 4,055 | May 16, 1845 | J.J. Springsteen | Water Wheel | turbine water wheels | |
| 145,304 | Dec. 09, 1873 | W.F. Moody | Improvement in rotary steam-engines | steam engines | |
| 2,545,453 | Mar. 20, 1951 | F.P. Forss | Portable rotary grinder or die filer | handheld power tools | |
| 3,934,657 | Jan. 27, 1976 | I.R. Danielson | Dual safety control means for a power tool | ||