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All Patents of Type: telegraphy apparatus
Patents 1 - 15 of 21
First set of recordsNext 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
RE79Jan. 15, 1846S.F. MorseImprovement in the mode of communicating information by signals by the application of electro-magnetismtelegraphy apparatus
4,453Apr. 11, 1846S.F. MorseImprovement in electro-magnetic telegraphstelegraphy apparatus
5,568May 16, 1848C.F. JohnsonImprovement in electric telegraphstelegraphy apparatus
RE118Jun. 13, 1848S.F. MorseImprovement in electro-magnetic telegraphstelegraphy apparatus
8,438Oct. 14, 1851J. YandellTelegraph insulatortelegraphy apparatus
NF-13Oct. 19, 1856W. ThomsonTelegraphic mirror galvanometertelegraphy apparatus
NF-15Mar. 04, 1857A.F. Woodman, M.G. FarmerImprovements in electric telegraphstelegraphy apparatus
16,828Mar. 17, 1857A.F. Woodman, M.G. FarmerImprovement in telegraphic repeaterstelegraphy apparatus
NF-29Oct. 19, 1866F.J. BoltonEmployment of written code of signals for telegraphingtelegraphy apparatus
NF-30Oct. 19, 1866C.F. Varley, W. ThomsonTransmission of signals of short duration through long lines of submarine cabletelegraphy apparatus
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