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| Patents for Robert B. Williamson | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 967,474 | Aug. 16, 1910 | R.B. Williamson | Brush-holder | |
 | 1,121,545 | Dec. 15, 1914 | R.B. Williamson | Dynamo-electric machine | |