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| All Patents in class 409/241 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,568,566 | Mar. 09, 1971 | M. Weidig | Tool Spindle Mechanism | metalworking machine tool holders | |
| 3,580,135 | May 25, 1971 | G.H. Jones | Clamping Apparatus for a Machine Tool | metalworking machine mechanisms | |
| 4,512,068 | Apr. 23, 1985 | T.W. Piotrowski | Pallet Receiver with Compliant Pin and Socket Registration | workpiece changers and storage mechanisms | |