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| Patents for Daniel R. Bowker | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 31,368 | Feb. 12, 1861 | W.P. Bensel, D.R. Bowker | Machine for chiming and jointing staves | |
 | RE1,474 | May 19, 1863 | D.R. Bowker, W.P. Bensel | Machine for chining and jointing staves | |