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| All Patents in class 91/196 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 68,008 | Aug. 20, 1867 | W.H. Morton, C. Scott | Oscillating Steam Engine | |
| 184,919 | Nov. 28, 1876 | J.M. Simpson | Rotary Engine | ||
| 618,453 | Jan. 31, 1899 | C. Rice, M.F. Coomes | Rotary Reciprocating Engine | ||
 | 1,268,270 | Jun. 04, 1918 | R.W. Nazel | Fluid-power hammer | |