Telegraph, Telegraphy and Signaling
Patents and Inventions
Invented by Samuel Morse in 1837 (US patent No. 1647)

The Telegraph was invented by Samuel Morse in 1837 (US patent No. 1647)

Title Primary Class Description Inventor Assignee Issue Date Patent No.
Improvement in revolving lights for lighthouses 116/202 To enable mariners to distinguish the light of one light-house from another and to save the need to add more lights for this purpose by using revolving lights created by using vertical revolving shades moving on a rail in front of the light causing it to appear and disappear in sudden flashes. Benjamin F. Willard
February 20, 1839 US1085
Improvement in electromagnetic telegraph 340/825.36 The five-needle telegraph Charles Wheatstone; William Fothergill Cooke
June 10, 1840 US1622
Improvement in the mode of communicating information by signals by the application of electro-magnetism 178/2R Samuel Morseís electrical telegraph that was capable of transmitting over long distances using poor quality wire. His assistant, Alfred Vail developed the Morse code signaling alphabet with Morse. America's first telegram was sent by Morse on 6 January 1838, across two miles (3 km) of wire at Speedwell Ironworks near Morristown, New Jersey. The message read "A patient waiter is no loser." Samuel F. B. Morse
June 20, 1840 US1647
Improvement in telegraphy 116/282 A mechanical signaling system using a stretched wire between two points of communication Samuel Frew
July 2, 1842 US2701
Method of introducing wire into metallic pipe 254/134.3R Introducing wires in hollow pipes through a hollow mandrel on which the metallic pipe is made Samuel F. B. Morse
October 25, 1843 US3316
Metallic Feflector 362/350 Improvement in signaling metallic reflectors of lighthouses and railroads for the purpose of protecting their polished surfaces Alonzo Farrar
April 4, 1844 US3518
Light-House Lamp 431/309 A moveable cap or ferrule applied to, or slipped upon the inner air tube of the burner for the flame to act upon, instead of against the top of the inner tube as heretofore arranged. Winslow Lewis
August 7, 1844 US3692
Improvement in signal-telegraphs 116/281 Flag semaphore: the combination of numeral and decimal or denominator flags; signaling the alphabet so as only to use one sign for each letter of the alphabet by means of decimal progression. Henry I. Rogers
September 27, 1844 US3765
Improvement in Electro-magnetic telegraphs 178/95 The use of a local battery and magnet in combination with a battery and magnet connected with the main line or lines to enable the telegraph operation over longer lines. Samuel F. B. Morse
April 11, 1846 US4453
Improvement in magnetic printing-telegraphs 178/35 Recording and printing the Morse code in alphabetic written form Royal E. House
April 18, 1846 US4464
Improvement in telegraph-manipulators 178/17A Improvement of telegraph key or manipulator Edward R. Roe
May 30, 1848 US5612
Improvement in insulating support for telegraph-wires 174/154 A roof serves to keep the insulator from contact with moisture, and also prevents it from being removed from its position R. R. Livingstone; J. J. Roggen; Calvin Adams
October 31, 1848 US5889
Bell-Telegraph 116/2 Bell communication by a few users in a building or ship by triggering different bell chimes for signals by pulling wires that activate a different bell signal. Jacob G. Day
December 19, 1848 US5969
Improvement in indicating-telegraph 340/815.58 Means of conveying intelligence at a distance by means of a revolving toothed dial marked with the successive series of the numerals 0, 1, 2, 3, 4 by which combination are indicated alphabetical letters. By hand turning the dial, the code is translated into electricity pulses. L. G. Curtiss
January 16, 1849 US6040
Improvement in electromechanical-telegraphs 178/62 Facsimile (fax): A style or point holder so as to afford the regulation of the style pressure on the surface of the chemically prepared paper or fabric and regulating the motion of the paper revolving wheel or roller and insure it being drawn continually forward. Robert Smith; Alexander Bain
October 30, 1849 US6837
Signal-Lantern 362/168 Subdividing the front of the lantern into three sections with different color glasses (green, red, white) that enable the creation of all needed signals for marine practice. Hugh Sangster
December 18, 1849 US6959
Improvements in telegraphs 178/35 Improvement of telegraph electromagnet (relay) speed by adding a spring to the armature David E. Hughes
May 20, 1856 US14917
Improvements in electric telegraphs 370/276 Time division telegraph: Transmitting different electric signals, alternately and successively, resulting from the actions of two or more operators working at the same time at the same or opposite ends of a single main conductor or wire of communication. Harrison Gray Dyar
June 30, 1857 US17673
Improvements in methods of laying submarine-telegraph cables 405/158 Improvements in methods of laying submarine-telegraph cables Owen G. Warren
September 28, 1858 US21634
Improvements in electro-magnetic telegraphs 370/276 Duplex telegraph, by dlaying signals of one operator. David E. Hughes
January 4, 1859 US22531
Improved method of enabling moving railway-trains to telegraph their own passings at certain stations 246/69 Railway alarm Ernst Otto Phol
January 11, 1859 US22610
Improvements in telegraphic machines 178/35 Printing telegraph Geo. M. Phelps
November 1, 1859 US26003
Improvements in telegraphs 178/99.1 Electro acoustic telegraph: Applying an acoustic tube to the operatorís ear to prevent the hearing of the messagesí sounds and clicks by unauthorized parties. Alexander Bain
July 23, 1861 US32854
Improvements in telegraph poles 174/32 Insulators are grounded by a wire running on the pole to the ground to prevent leakage and telegraphic disturbances C. F. Varley
March 10, 1868 US75492
Improvements in reflecting galvanometers 324/97 A sensitive galvanometer to measure tiny currents especially for testing long telegraph submarine lines and analogous telegraph circuits William Thomson (Lord Kelvin)
July 6, 1869 US92228
Improvement in electric telegraph apparatus 178/91 Prevention of the accumulation of ink at the point of the marking tube when signals are not being received; preventing vibration from the paper drawing gear and marking tube; the same paper is applied for recording the transmitted and received message. William Thomson (Lord Kelvin)
November 17, 1874 US156897
Improvements in transmitters and receivers for electric telegraphs 178/17B Transmitting two or more telegraphic messages on the same line simultaneously using different frequencies Alexander Graham Bell Himself and Thomas Sanders; Gardiner G. Hubbard April 6, 1875 US161739
Improvements in electric telegraphs for transmitting musical tones 178/47 Consisted of multi-tone transmitters, each tone being controlled by a separate telegraph key; conveying several messages through the same wire at the same time; and these can either be read by the operator by the sound, or a permanent record can be made by the marks drawn on a ribbon of travelling paper by a Morse recorder. Elisha Gray Elisha Gray; Samuel S. White July 27, 1875 US166096
Improvements in telegraph-wires 174/121R Employment of strands of hemp or other fibrous substances, laid up around the wire in the form of a rope to give great longitudinal strength to the cable, while it is left sufficiently flexible. Timothy Gordon
April 4, 1876 US175693
Improvements in electric- telegraph apparatus 178/3 Automatically transmit a telegraph message recorded in a fillet of paper and to automatically reproduce facsimile copies of such record Royal E. House
July 25, 1876 US180090
Improvements in earth-batteries for electric clocks 429/47 An Earth battery is a pair of electrodes made of two dissimilar metals, such as iron and copper, which are buried in the soil or immersed in the sea. The Earth battery, in general, generated power for early telegraph transmissions and formed part of a tuned circuit that amplified the signalling voltage over long distances. Daniel Drawbaugh Daniel Drawbaugh; Theodor Grissinger; Jacob H.Grissinger January 14, 1879 US211322
Improvement in self-adjusting relays 335/274 Relays constructed so that currents passing through them will govern the spring of the armature and cause it to adjust itself to the force applied by the current being either very strong or very weak. Peter S. Bates
October 7, 1879 US220333
Combined telegraph and clock system 178/49 To enable automatic transmission of time signals and telegraphic signals so they will not conflict with each other Charles E. Buell
June 12, 1883 US279327
Printing-telegraph 178/34 Automatic telegraph translator of the Morse code signals into alphabetical letters using only one wire Jean Maurice Emile Baudot
August 21, 1888 US388244
Duplex Telegraph 370/297 Quadruplex telegraph: Enable two operators to simultaneously send telegraphic signals over one wire in one direction by reversal of a battery current in one case and increasing and decreasing the current in the second instance. By combining this system with any system that simultaneously doubles the transmission in opposite directions, four transmitter operators and four receiving operators can work at the same time. (Foreign patents: Great Britain No. 384 (1875); France No. 107859 (1875); Italy No. 2940, 7803 (1875); Austria-Hungary No. 2936, 14584 (1875); Russia No. 3163 (1878).) Thomas A. Edison Western Union Telegraph Company August 9, 1892 US480567

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