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| All Patents in class 279/3 | |||||
| Picture | Number | Date | Patentee | Title | |
| 1,118,072 | Nov. 24, 1914 | H.W. Thompson | Chuck Mechanism | ||
| 2,843,389 | Jul. 15, 1958 | L.B. Swanson, H.E. Sloan | Chuck | ||
| 3,293,739 | Dec. 27, 1966 | C.W. Hoglund, A.G. Coy | Method of holding deformable objects | ||