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| Patents for D. J. Brown | |||||
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| Picture | Number | Date | Patentee | Title | |
| 115,600 | Jun. 06, 1871 | J.S. Crane, J.T. Gilmore | Improvement in Machines for Dressing Millstones | ||
 | 390,807 | Oct. 09, 1888 | O. Schimansky | Machine for planing hoops | |