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| All Patents in class 48/189.3 | |||||
| Number | Date | Patentee | Title | Type | |
| 545,125 | Aug. 27, 1895 | B.W. Grist | Vaporizer for Gas Motor | carburetors | |
| 1,298,068 | Mar. 25, 1919 | B.T. McCanna, E.R. Klemm | Gas-engine governor and auxiliary air-inlet | internal combustion engine governors | |