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| All Patents in class 123/22 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 30,701 | Nov. 20, 1860 | S. Wilcox, Jr. | Air Engine | ||
| RE1,942 | Apr. 25, 1865 | S. Wilcox, Jr. | Air Engine | ||
| 67,659 | Aug. 13, 1867 | N.A. Otto, E. Langen | Gas Engine | ||
| 293,179 | Feb. 05, 1884 | A. Cliff, C.W. King | Gas Engine | ||
| 315,808 | Apr. 14, 1885 | T. McDonough | Gas Engine | ||
| 337,226 | Mar. 02, 1886 | G.C. Anthony | Gas Engine | ||
| 343,745 | Jun. 15, 1886 | S. Wilcox | Gas Engine | ||
| 666,368 | Jan. 22, 1901 | H.F. Wallman | Internal Combustion Engine | ||