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| All Patents in class 415/152.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,551X | Mar. 30, 1836 | C.S. Mercer | Water wheel | water wheels | |
| 202,134 | Apr. 09, 1878 | B.T. Babbitt | Rotary Engine | rotary steam engines | |
| 1,031,834 | Jul. 09, 1912 | B. Brazelle | Fluid-pressure engine | rotary steam engines | |
| 2,349,838 | May 30, 1944 | C. Granqvist, H.V. Alexandersson | Micrometer | micrometers | |