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| All Patents in class 74/424.72 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,407,160 | Feb. 21, 1922 | D.C. Klausmeyer | Declutchable Safety Collar for Rotatable Nuts | metalworking machine mechanisms | |
| 3,393,577 | Jul. 23, 1968 | B.R. Better | Pre-Loaded Ball Screw Assembly | metalworking machine bearings | |