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| Patents for Grafton L. McGill | |||||
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| Number | Date | Patentee | Title | Type | |
| 639,640 | Dec. 19, 1899 | M. Williams | Improvements in Pipe-Wrenches | pipe wrenches | |
| 641,474 | Jan. 16, 1900 | M.J. Todd | Harrow Tooth Holder | harrows | |