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| Patents for O. M. Hill | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 341,714 | May 11, 1886 | C. Albert | Parallel Dividers | |
 | 355,103 | Dec. 28, 1886 | L.L. Sagendorph | Shears | |
 | 475,299 | May 24, 1892 | C.J. Colling | Machine for bending sheet metal | |
 | 522,471 | Jul. 03, 1894 | J. Kohler | Combination Tool For Pipe Fitting | |