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| All Patents in class 279/19.5 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,346,978 | Jul. 20, 1920 | E.E. Blackstone, J.J. Riley | Tool Holder | tool holders | |
| 2,102,264 | Dec. 14, 1937 | J.F. Haas | Tool retainer for portable power driven tools | handheld power tools | |