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| All Patents in class 81/433 | |||||
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| Number | Date | Patentee | Title | Type | |
| 950,534 | Mar. 01, 1910 | W.P. Hunt | Screw-driving machine | screw driving machines | |
| 1,003,462 | Sep. 19, 1911 | W.P. Hunt, R.B. Weaver | Feeding mechanism for automatic screw-driving machines | screw driving machines | |
| 3,381,725 | May 07, 1968 | A. Locher | Drilling and inserting machine | dowel insertion machines | |