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| All Patents in class 279/55 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,397,025 | Mar. 19, 1946 | J. MacBlane | Automatic Chuck | drill press chucks | |
| 2,793,867 | May 28, 1957 | H.O. Stuart | Self Aligning Tool Holder for Turret Lathes | drilling and boring tool holders | |
| 4,724,730 | Feb. 16, 1988 | J.A. Van Lenten, W.G. Mader | Wrench socket with cam locking feature | wrench sockets | |