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| All Patents in class 384/617 | |||||
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| Number | Date | Patentee | Title | Type | |
| 968,372 | Aug. 23, 1910 | G.O. Leopold | Ball-bearing | tool making machines | |
| 1,555,140 | Sep. 29, 1925 | G.H. Matthews | Removable cutter head for motor-driven molders | molders | |
| 2,847,593 | Aug. 12, 1958 | L.G. Selbach, H.C. Bodine | Electric motor | motor bearings | |