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| All Patents in class 418/141 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 202,888 | Apr. 23, 1878 | B.H. Taylor | Rotary Engine | ||
 | 2,349,838 | May 30, 1944 | C. Granqvist, H.V. Alexandersson | Micrometer | |