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All Patents of Type: telegraphic apparatus
Patents 1 - 7 of 7
First set of recordsLast set of records
NumberDatePatenteeTitleType
17,355May 19, 1857M.G. Farmer, W.F. ChanningElectromagnetic Fire Alarm Telegraph for Citestelegraphic apparatus
21,492Sep. 14, 1858J.M. Batchelder, M.G. FarmerTelegraph Insulatortelegraphic apparatus
195,751Oct. 02, 1877T.A. EdisonAutomatic Telegraphtelegraphic apparatus
200,032Feb. 05, 1878T.A. EdisonSynchronous Movements for Electric Telegraphstelegraphic apparatus
333,289Dec. 29, 1885T.A. EdisonTelegraphytelegraphic apparatus
333,290Dec. 29, 1885T.A. EdisonDuplex Telegraphytelegraphic apparatus
333,291Dec. 29, 1885T.A. EdisonWay-Station Quadruplex Telegraphtelegraphic apparatus
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