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| All Patents in class 123/73AA | |||||
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| Number | Date | Patentee | Title | Type | |
| 607,536 | Jul. 19, 1898 | M.F. Bates | Gas Engine | gas and gasoline engines | |
| 683,886 | Oct. 01, 1901 | E.J. Woolf | Explosive Engine | internal combustion engines | |
| 819,258 | May 01, 1906 | C.W. Weiss | Internal Combustion Engine | oil engines | |
| 1,075,889 | Oct. 14, 1913 | E.J. Woolf | Two-Cycle Explosive Engine | internal combustion engines | |
| 1,151,156 | Aug. 24, 1915 | W.O. Bingaman | Carbureter | carburetors | |
| 1,259,959 | Mar. 19, 1918 | F.B. Cockburn | Head Stock for Engine Lathes | engine lathes | |