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| Patents for William M. Dudgeon | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 706,850 | Aug. 12, 1902 | L.S. Pitcher | Hydraulic jack | |
 | 899,462 | Sep. 22, 1908 | J.W. Nelson, W.H. Mathers | Air-valve for hydraulic jacks | |