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| All Patents in class 137/543.13 | |||||
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| Number | Date | Patentee | Title | Type | |
| 455,001 | Jun. 30, 1891 | J.E. Lonergan | Testing-yoke for safety-valves | steam safety valves | |
| 556,037 | Mar. 10, 1896 | C.W. Weiss | Valve | internal combustion engine valves | |
| 1,229,459 | Jun. 12, 1917 | C.B. Jahnke, F.G. Hobart | Suction-valve holder | internal combustion engine valves | |