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| All Patents in class 137/855 | |||||
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| Number | Date | Patentee | Title | Type | |
| 105,913 | Aug. 02, 1870 | N.T. Coffin | Improvement in pump-valve | ||
| 1,530,113 | Mar. 17, 1925 | J.G. Gibson | Valve | internal combustion engine valves | |