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| All Patents in class 261/116 | |||||
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| Number | Date | Patentee | Title | Type | |
| 971,248 | Sep. 27, 1910 | W.H. Carrier | Humidifying apparatus | ||
| 1,926,723 | Sep. 12, 1933 | C.B. Jahnke | Exhaust Silencing Means | exhaust mechanisms | |