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| All Patents in class 470/9 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,172 | Jun. 18, 1839 | S.H. Wills | Improvement in Machines for Cutting Screws in Wood for Framing Purposes | wood threading machines | |
| 1,908,080 | May 09, 1933 | J.P. Thompson | Screw | ||