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| All Patents in class 74/424.84 | |||||
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| Number | Date | Patentee | Title | Type | |
| 756,388 | Apr. 05, 1904 | W.B. May | Means for converting reciprocatory into rotary motion | spiral screwdrivers | |
| 5,535,638 | Jul. 16, 1996 | R.H. Willison | Antifriction Screw Drive | metalworking power transmission | |