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| All Patents in class 384/213 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,129,229 | Feb. 23, 1915 | W.O. Platt | Bearing for Oil Well Jacks and Swing Levers | oilfield machinery | |
| 1,792,645 | Feb. 17, 1931 | E.P. Larsh | Armature bearing for electric motors | motor bearings | |