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| All Patents in class 137/532 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 59,764 | Nov. 20, 1866 | C.M. Farrar | Improvement in Lock-Up Safety Valve | |
 | 85,792 | Jan. 12, 1869 | G.H. Clemens | Improvement in steam safety-valves | |
| 86,346 | Feb. 02, 1869 | J. Ashcroft | Safety Valve | ||
 | 94,747 | Sep. 14, 1869 | B. Holly | Water Pipe Safety Valve | |
| 168,914 | Oct. 19, 1875 | N.E. Nash | Governors for Steam Engines | ||
 | 944,416 | Dec. 28, 1909 | A.W. Graham, F.N. Connet | Valve | |