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