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| All Patents in class 470/186 | |||||
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| Number | Date | Patentee | Title | Type | |
| 501,942 | Jul. 25, 1893 | C.A. Higbee | Tool for trimming screw-threads | metal threading machines | |
| 585,204 | Jun. 29, 1897 | C.A. Higbee | Thread-cutting tool | metal threading machines | |