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| All Patents in class 261/117 | |||||
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| Number | Date | Patentee | Title | Type | |
| 545,125 | Aug. 27, 1895 | B.W. Grist | Vaporizer for Gas Motor | carburetors | |
| 660,778 | Oct. 30, 1900 | J.W. Lambert | Mixer and vaporizer for gas-engines | gas and gasoline engines | |
| 1,059,976 | Apr. 29, 1913 | W.H. Carrier | System for purifying, humidifying, and controlling the humidity of air | ||