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| All Patents in class 60/325 | |||||
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| Number | Date | Patentee | Title | Type | |
| 120,545 | Oct. 31, 1871 | C.L. Stevens | Improvement in hydro-pneumatic motors | pneumatic motors | |
| 403,430 | May 14, 1889 | C.R. Hunt | Steam and Water Motor | rotary steam engines | |
| 2,668,557 | Feb. 09, 1954 | W.G. Hoelscher | Conduit System for Machine Tools | metal lathe mechanisms | |