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| All Patents in class 346/79 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,152,804 | Sep. 07, 1915 | G.W. Freeland | Recording mechanism | locomotive coal feeding apparatus | |
| 1,690,517 | Nov. 06, 1928 | C.H. Wilson, C.J. Brown | Electrical controller and recorder | industrial furnaces | |