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| All Patents in class 30/298.4 | |||||
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| Number | Date | Patentee | Title | Type | |
| 126 | Feb. 16, 1837 | P. Williams | Improvement in Machines for Cutting the Screws of Screw-Bedsteads | wood threading machines | |
| 1,969,677 | Aug. 07, 1934 | A.L. Stowell | Safety holder for tools | ||