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| Patents for A. W. Hart | |||||
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| Number | Date | Patentee | Title | Type | |
| 114,427 | May 02, 1871 | P. Estes | Improvement in Piston-Packings | piston ring and packing | |
| 1,037,109 | Aug. 27, 1912 | W.L. Bessolo | Pipe Wrench | pipe wrenches | |