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| All Patents in class 384/609 | |||||
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| Number | Date | Patentee | Title | Type | |
| 496,828 | May 02, 1893 | G. Hays | Ball Bearing for Lathe Spindles | metalworking machine bearings | |
| 642,615 | Feb. 06, 1900 | C.W. Kragh | Dynamo Electric Machine | motor bearings | |
| 778,379 | Dec. 27, 1904 | A.O. Slentz | Turn-table | vehicle mechanic | |
| 908,872 | Jan. 05, 1909 | G.O. Leopold | Ball bearing | ||
| 1,767,272 | Jun. 24, 1930 | A.W. Beaman | Knife-grinder bearing | cutter grinding | |