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| Patents for John A. Gilchrist | |||||
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| Number | Date | Patentee | Title | Type | |
| 612,946 | Oct. 25, 1898 | W.E. Hotchkiss | Support for drilling-machines | drill presses | |
| 614,866 | Nov. 29, 1898 | W.E. Hotchkiss | Automatic feeding-mechanism for drilling-machines | drill presses | |