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| All Patents in class 137/516.25 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 793,947 | Jul. 04, 1905 | F.A. Hannah, J.H. Millett | Steam Safety Valve | ||
 | 833,632 | Oct. 16, 1906 | W.H. Ridgway | Steam hydraulic hoist | |
| 1,806,301 | May 19, 1931 | J.L. Valley | Pressure controlled valve | ||