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| All Patents in class 137/472 | |||||
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| Number | Date | Patentee | Title | Type | |
| 200,119 | Feb. 12, 1878 | H.G. Ashton | Improvement in Safety-Valves | steam safety valves | |
| 921,360 | May 11, 1909 | F. Casey | Safety-Valve | steam safety valves | |
| 1,032,482 | Jul. 16, 1912 | W.E. Jerauld | Safety Valve | steam safety valves | |
| 1,685,866 | Oct. 02, 1928 | F.E. Raymond | Safety and Relief Valve | steam safety valves | |
| 2,001,375 | May 14, 1935 | H.S. Baker | Safety Valve | steam safety valves | |