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| All Patents in class 200/13 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 681,133 | Aug. 20, 1901 | T.S. Perkins | Starting Apparatus for Electric Motors | ||
| 1,709,935 | Apr. 23, 1929 | F. Diehl | Starting device for electric motors | ||
| 3,089,989 | May 14, 1963 | J.A. Rave, Jr. | Positioning Device Including Means for Dividing Intervals into Preselected Numbers of Equal Parts | ||