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| All Patents in class 418/114 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 89,269 | Apr. 27, 1869 | M.L. Andrew | Improvement in rotary pumps | |
| 293,511 | Feb. 12, 1884 | J.H. Phelps | Rotary Engine | ||
| 465,947 | Dec. 29, 1891 | W.J. Putnam | Rotary Engine | ||