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| Patents for Dudgeon & Lyon | |||||
| Number | Date | Patentee | Title | Type | |
| 8,203 | Jul. 08, 1851 | R. Dudgeon | Portable hydraulic press | hydraulic jacks | |
| 22,713 | Jan. 25, 1859 | R. Dudgeon | Hydraulic press | hydraulic jacks | |