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| Patents for Joel M. Dennis | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 141,955 | Aug. 19, 1873 | J.H. McNamar, R. Scheidler | Portable Steam-Engines | |
 | 164,219 | Jun. 08, 1875 | J.H. McNamar, R. Scheidler | Throttle Valve | |