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| All Patents in class 428/939 | |||||
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| Number | Date | Patentee | Title | Type | |
| 109,665 | Nov. 29, 1870 | J. Richards | Improvement in the Manufacture of Wrenches | wrenches | |
| 2,455,183 | Nov. 30, 1948 | F.H. Lobdell | Tool | ||