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| All Patents in class 408/219 | |||||
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| Number | Date | Patentee | Title | Type | |
| 93,824 | Aug. 17, 1869 | W. Humphreys | Improved Compound Tool for Water and Gas Pipes | pipe reamers | |
| 117,082 | Jul. 18, 1871 | J.J. Kraus | Improvement in wood-boring tools | tapered reamers | |
| 224,921 | Feb. 24, 1880 | W. Kenworthy | Tap | taps and dies | |
| 832,380 | Oct. 02, 1906 | J. Hartness | Tap and Process of Making the Same | taps and dies | |
| 992,946 | May 23, 1911 | D.W. Edwards | Wood-Tap | wood threading machines | |