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| All Patents in class 470/25 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,384,118 | Jul. 12, 1921 | J.R. Blakeslee | Manufacture of Nuts and Similar Articles | manufacturing nuts and bolts | |
| 2,787,796 | Apr. 09, 1957 | J. Rosan | Method of Converting Standard Threads into Locking Threads | machining | |