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| Patents for A. J. Bowen | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,656 | May 30, 1842 | R.M. Hoe | Machinery for grinding and polishing metallic surfaces, particularly saw-plates | |
 | 3,550 | Apr. 17, 1844 | R.M. Hoe | Inking-roller | |
 | 3,551 | Apr. 17, 1844 | R.M. Hoe | Printing-press | |