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| All Patents of Type: electric alternators | |||||
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| Number | Date | Patentee | Title | Type | |
| 909,136 | Jan. 12, 1909 | B.A. Behrend | Dynamo Electric Machine | electric alternators | |
| 2,718,604 | Sep. 20, 1955 | G.H. Herrick | Collector Ring Assembly | electric generators | |
| 2,724,067 | Nov. 15, 1955 | G.H. Herrick | Axial Air Gap Generator | electric alternators | |