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| All Patents in class 415/123 | |||||
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| Number | Date | Patentee | Title | Type | |
| 94,868 | Sep. 14, 1869 | J. Chase | Turbine Water Wheel | water wheels | |
| 202,134 | Apr. 09, 1878 | B.T. Babbitt | Rotary Engine | rotary steam engines | |
| 202,461 | Apr. 16, 1878 | G.B. Phillips | Portable Forges | portable forges | |
| 580,097 | Apr. 06, 1897 | H.D. Williams | Governor for Water Motor | water wheel governors | |
| 763,572 | Jun. 28, 1904 | D.W. Starrett | Water Wheel Governor | water wheel governors | |
| 1,782,456 | Nov. 25, 1930 | G.A. Biggs | Turbine Regulating Device | water wheel governors | |