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| All Patents in class 165/174 | |||||
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| Number | Date | Patentee | Title | Type | |
| 500,701 | Jul. 04, 1893 | D.S. Abbott, C.G. Redstone | Condenser | leatherworker | |
| 621,693 | Mar. 21, 1899 | G.W. Morris | Water Heater | steam engines | |