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All Patents in class 335/93 | |||||
Number | Date | Patentee | Title | Type | |
286,274 | Oct. 09, 1883 | P.B. Delany | Electrical Synchronous Movement | synchronous motors | |
286,276 | Oct. 09, 1883 | P.B. Delany | Electrical Synchronous Movement | synchronous motors |