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| All Patents in class 91/174 | |||||
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| Number | Date | Patentee | Title | Type | |
| 313,728 | Mar. 10, 1885 | D.D. Hardy | Steam Engine | steam engines | |
| 355,037 | Dec. 28, 1886 | E.C. Terry | Piston Water Meter | water meters | |
| 871,086 | Nov. 12, 1907 | W.O. Duntley, G.H. Hayes | Engine | pneumatic tools | |