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| Patents for G. K. McGregor | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 612,946 | Oct. 25, 1898 | W.E. Hotchkiss | Support for drilling-machines | |
![]() | 614,866 | Nov. 29, 1898 | W.E. Hotchkiss | Automatic feeding-mechanism for drilling-machines | |