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| All Patents in class 137/505.18 | |||||
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| Number | Date | Patentee | Title | Type | |
| 66,028 | Jun. 25, 1867 | I. Judson | Improved hydraulic-pressure regulator | ||
| 1,772,406 | Aug. 05, 1930 | L.E. Whiton | Valve | steam valves | |