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| All Patents in class 136/222 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,103,640 | Jul. 14, 1914 | C.H. Wilson | Thermo-electric pyrometer | industrial furnaces | |
| 1,169,617 | Jan. 25, 1916 | E.W. Comfort | Thermo-electric humidity instrument | ||
| 1,996,943 | Apr. 09, 1935 | D.D. Wile | Fluid Measuring Device | electrical measuring apparatus | |