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All Patents of Type: telegraphy apparatus
Patents 1 - 11 of 11
First set of recordsLast set of records
305XOct. 24, 1800J. Grout, Jr.Telegraphtelegraphy apparatus
1,062XJun. 14, 1809W. ShultzTelegraphtelegraphy apparatus
3,463XMar. 02, 1822D. PiersonDomestic telegraphtelegraphy apparatus
3,713XJun. 18, 1823J.M. ElfordTelegraphtelegraphy apparatus
1,647Jun. 20, 1840S.F. MorseElectric telegraphtelegraphy apparatus
4,453Apr. 11, 1846S.F. MorseImprovement in electro-magnetic telegraphstelegraphy apparatus
5,568May 16, 1848C.F. JohnsonImprovement in electric telegraphstelegraphy apparatus
8,438Oct. 14, 1851J. YandellTelegraph insulatortelegraphy apparatus
113,034Mar. 28, 1871T.A. EdisonImprovement in printing-telegraph apparatustelegraphy apparatus
132,456Oct. 22, 1872T.A. EdisonImprovement in apparatus for perforating paper for telegraphic usetelegraphy apparatus
174,465Mar. 07, 1876A.G. BellImprovement in telegraphytelegraphy apparatus
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