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| All Patents in class 237/78R | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,095,156 | Apr. 28, 1914 | W.H. Carrier | Apparatus for controlling the humidity and temperature of air | ||
| 1,949,993 | Mar. 06, 1934 | J.Y. Dahlstrand | Unit Heater | heaters | |
| 2,189,003 | Feb. 06, 1940 | K.A. Harmon | Humidifier | ||