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| All Patents in class 137/596 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | RE921 | Mar. 06, 1860 | A. Crosby | Improved valve for steam-engines | |
 | 257,871 | May 16, 1882 | J. Humphreys, Jr. | Pump | |
| 486,099 | Nov. 15, 1892 | H.F. Frisbie | Valve for Steam Engines | ||
 | 666,156 | Jan. 15, 1901 | E.B. Ridgway | Steam hydraulic elevator | |
| 808,014 | Dec. 19, 1905 | E.T. Cope | Steam Engine Valve | ||
| 1,537,437 | May 12, 1925 | G. Graffinberger | Trimmer-saw mechanism | ||
 | 3,696,834 | Oct. 10, 1972 | W. Vonhoff, Jr. | Fluid control device | |