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| Patents for Benjamin F. Ennis | |||||
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| Number | Date | Patentee | Title | Type | |
| 837,677 | Dec. 04, 1906 | B.F. Ennis | Indicator for Truing Up Work | measurement gauges | |
| 917,029 | Apr. 06, 1909 | B.F. Ennis | Lathe Tool Holder | lathe tool holders and tool posts | |