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| All Patents in class 92/68 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 129,635 | Jul. 16, 1872 | W.I. Weed | Improvment in Rotary Engines | ||
| 260,598 | Jul. 04, 1882 | J.A. Miller | Traction Engine | ||
| 540,490 | Jun. 04, 1895 | A.R. Holmes | Gas Engine | ||
| 603,914 | May 10, 1898 | F.S. Mead | Gas or Oil Engine | ||
| 1,037,297 | Sep. 03, 1912 | W.H. Newbrough | Multiple Cylinder Pump | ||
 | 1,172,901 | Feb. 22, 1916 | C.H. Peck | Fluid-operated drills | |
 | 2,253,490 | Aug. 26, 1941 | H.F. Bakewell | Internal combustion engine | |