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| All Patents in class 91/24 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,097,543 | May 19, 1914 | J.C. Glenn | Engine Valve | steam engine valves | |
| 1,937,244 | Nov. 28, 1933 | G.M. Pelton | Control means for dogging mechanism | sawmill dogs | |