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| All Patents in class 206/223 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,526,732 | Oct. 24, 1950 | S.A. Cogsdill | Container for Holding a Set of Drills and Punch | drill holders | |
| 2,775,341 | Dec. 25, 1956 | R.J. Williams | Hand Bit Assembly Holder | hand drills | |