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| All Patents in class 470/78 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 122,702 | Jan. 16, 1872 | O.C. Burton | Improvement in Machines for Cutting Threads on Bolts | ||
| 133,574 | Dec. 03, 1872 | G. Emig | Machines for Cutting Screw Threads on Bolts and Nuts | ||
| 1,560,462 | Nov. 03, 1925 | R.A. Boehm | Self Opening and Closing Threading Die Holder | ||