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