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| All Patents in class 279/79 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,596,594 | May 13, 1952 | J.N. Petre | Chuck Feature of Tools of the Detachably Connected Shank and Handle Type | screwdriver mechanisms | |
| 2,651,108 | Sep. 08, 1953 | J.B. Weems | Blade and Tool Holder | tool holders | |
| 2,890,072 | Jun. 09, 1959 | P.E. Vega, F.A. Kaman | Retainer for rotary power tools | ||
| 2,956,792 | Oct. 18, 1960 | G.A. Yates | Cutting Tool Holder Having a Resiliently Biased Retaining Means | tool holders | |