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| All Patents in class 307/37 | |||||
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| Number | Date | Patentee | Title | Type | |
| 244,331 | Jul. 12, 1881 | W. Stanley, Jr. | Circuit-closer for incandescent lamps | electric switches | |
| 867,154 | Sep. 24, 1907 | W.J. Richards | System of motor control | motor controls | |