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| All Patents in class 310/234 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,421,212 | Jan. 14, 1969 | E.W. Chabot | Method of producing commutator lead connection | handheld power tools | |
| 3,471,731 | Oct. 07, 1969 | R.M. Pierce, L.C. Pratt | Armature | electric motors | |