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| All Patents in class 74/424.82 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 477,642 | Jun. 28, 1892 | C.E. Brunthaver | Ball-bearing for screw-nuts | |
| 2,749,812 | Jun. 12, 1956 | T.A. Wetzel | Ball Bearing Nut and Screw Mechanism | ||