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| Patents Granted on 1851-07-08 | |||||
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| Number | Date | Patentee | Title | Type | |
| 8,203 | Jul. 08, 1851 | R. Dudgeon | Portable hydraulic press | hydraulic jacks | |
| 8,206 | Jul. 08, 1851 | B. Holly, J.W. Wheeler | Machine for grooving lumber | dado machines | |