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| All Patents in class 408/155 | |||||
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| Number | Date | Patentee | Title | Type | |
| 428,803 | May 27, 1890 | P.T. Coffield | Tap | taps and dies | |
| 509,039 | Nov. 21, 1893 | L. Kirchenbauer | Bolt Threader | tap and die holders | |
| 1,100,984 | Jun. 23, 1914 | W. Murchey | Screw-cutting tap | tapping heads and chucks | |
| 2,035,285 | Mar. 24, 1936 | W.R. Vosper | Thread Cutting Tool | tap and die holders | |