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| Patents for Richard Michael Carroll | |||||
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| Picture | Number | Date | Patentee | Title | |
 | CA-53,344 | Aug. 27, 1896 | R.M. Carroll | Improvements in Spanners or Wrenches | |
 | 572,191 | Dec. 01, 1896 | R.M. Carroll | Improvements in Spanners and Wrenches | |
 | 803,397 | Oct. 31, 1905 | R.M. Carroll | Pipe Wrench and Shifting Spanner | |