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| All Patents in class 318/686 | |||||
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| Number | Date | Patentee | Title | Type | |
| 267,062 | Nov. 07, 1882 | E.R. Cowell | Electric Distance Register | distance registers | |
| 287,511 | Oct. 30, 1883 | T.A. Edison | Electric Regulator | motor regulators | |