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| All Patents in class 318/430 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,948,037 | Feb. 20, 1934 | F.S. Kingston | Electric motor | electric motors | |
| 2,351,649 | Jun. 20, 1944 | D.E. Bench, G.J. Wintermute | Method and Apparatus for Controlling the Operation of Lathes | metal lathes | |