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| All Patents in class 251/129.03 | |||||
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| Number | Date | Patentee | Title | Type | |
| 574,320 | Dec. 29, 1896 | A. Giesler | Electric Water Wheel Governor | water wheel governors | |
| 1,795,310 | Mar. 10, 1931 | W.E. Mathews | Compressor Unloader | air compressors | |
| 2,043,194 | Jun. 02, 1936 | L.W. Eggleston | Valve | valves | |
| 2,225,586 | Dec. 17, 1940 | E.J. Dillman | Control Device | industrial control apparatus | |