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| All Patents in class 409/7 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 403,791 | May 21, 1889 | H.H. Taylor | Machine for Cutting Right and Left Threads on Nipples | ||
| 1,537,801 | May 12, 1925 | F.B. Cockburn | Combined Turning and Milling Machine | ||