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| Patents for Henry E. Cowdrey | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,075,245 | Oct. 07, 1913 | W.C. Farnum | Handle-turning machine | pattern lathes | |
| 1,164,272 | Dec. 14, 1915 | W.C. Farnum | Feeder for boring and turning machines | wood lathe accessories | |
| 1,319,046 | Oct. 21, 1919 | H.E. Cowdrey | Lathe for making tool handles | pattern lathes | |