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| All Patents in class 470/83 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,450,238 | Sep. 28, 1948 | B.H. Jordan | Tap Holder | ||
| 2,807,812 | Oct. 01, 1957 | M.S. Wozniak | Laterally Adjustable Tool Holder | screw machines | |
| 2,858,553 | Nov. 04, 1958 | J.A. Bearhalter | Releasable Thread Cutting Tool Holder With Reversible Clutch Means for Opposite Hand Thread Cutting | tapping heads and chucks | |