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| All Patents in class 74/424.87 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,161,073 | Dec. 15, 1964 | D.M. Price, H.W. Deutsch | Ball Screw Mechanism | metalworking machine mechanisms | |
| 3,301,082 | Jan. 31, 1967 | J.W. Kosinski | Ball Screw Mechanism | metalworking machine bearings | |