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All Patents of Type: temperature gauges | |||||
Number | Date | Patentee | Title | Type | |
284,382 | Sep. 04, 1883 | C.L. Clarke | Circuit and Apparatus for Electric Temperature and Pressure Indicator | vacuum and pressure gauges | |
494,244 | Mar. 28, 1893 | E. Brown | Pyrometer | temperature gauges | |
1,404,771 | Jan. 31, 1922 | F.H. Hopkins | Compensating Thermometer | temperature gauges |