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| Patents for Louis D. Bartlett | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 57,046 | Aug. 07, 1866 | S.W. Putnam | Improvement in sawing-machines | |
 | 61,141 | Jan. 15, 1867 | L.D. Bartlett | Improvement in valves of steam engines | |