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| All Patents in class 279/2.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 167,277 | Aug. 31, 1875 | W.B. Smith | Chuck for Holding Excentrics While Being Turned | metal lathe chucks | |
| 2,250,631 | Jul. 29, 1941 | W.R. Meyer, W.F. Groene | Crankshaft Chuck | metal lathe chucks | |