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| All Patents in class 470/203 | |||||
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| Number | Date | Patentee | Title | Type | |
| 415,846 | Nov. 26, 1889 | F.H. Richards | Screw Tapping Machine | nut or bolt making machines | |
| 635,324 | Oct. 24, 1899 | R. Kilburn | Tap for Forming Screw Threads | taps and dies | |
| 1,320,660 | Nov. 04, 1919 | H.W. Thompson | Lathe Chuck | metal lathe chucks | |
| 1,391,639 | Sep. 20, 1921 | V.R. Koontz | Collapsible tap | taps and dies | |
| 1,983,189 | Dec. 04, 1934 | A.J. Prance | Thread cutting tool | tapping heads and chucks | |