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| All Patents in class 140/92.1 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 482,825 | Sep. 20, 1892 | R. Eickemeyer | Armature-winding for dynamo-electric machines | ||
 | 979,375 | Dec. 20, 1910 | J. Burke | Method of forming coils for armature-windings | |
 | 3,452,786 | Jul. 01, 1969 | W.W. Lund, C.P. Mahloch | Apparatus for forming a winding | |