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Before the discovery of electromagnetic waves and the development of radio communication, there were many wireless telegraph systems proposed and tested. [4] In April 1872 William Henry Ward received U.S. patent 126,356 for a wireless telegraphy system where he theorized that convection currents in the atmosphere could carry signals like a telegraph wire. [5]
An employee of the Marconi Company, England, 1906 Marconi Wireless Station in Somerset, New Jersey, in 1921 Marconi advertisement from the 26 October 1923 issue of The Radio Times, threatening prosecution for infringements of Marconi patents . Marconi's "Wireless Telegraph and Signal Company" was formed on 20 July 1897 after a British patent ...
In 1915, Tesla attempted to sue the Marconi Company for infringement of his wireless tuning patents. Marconi's initial radio patent had been awarded in the US in 1897, but his 1900 patent submission covering improvements to radio transmission had been rejected several times, before it was finally approved in 1904, on the grounds that it ...
[77] [33] Tesla sued Marconi's company for patent infringement but didn't have the resources to pursue the action. In 1943 the US Supreme Court invalidated the inductive coupling claims of Marconi's patent [ 78 ] due to the prior patents of Lodge, Tesla, and Stone, but this came long after spark transmitters had become obsolete.
This is the initial patent for radio-based wireless telegraphy. 1896: Bose goes to London on a lecture tour and meets Marconi, who was conducting wireless experiments for the British post office. 1897: Marconi establishes a radio station on the Isle of Wight, England.
U.S. patent 390,414 - Dynamo Electric Machine - 1888 October 2 - Related to the patents of Tesla and Charles F. Peck, numbers: US381968 and US382280; Ordinary forms of continuous and alternate current systems may be adapted to Tesla's system, with slight changes to the systems; Effects their forms; Only the best and most practical solutions are ...
Looking to expand their efforts worldwide, a roster of subsidiary companies was established, holding regional rights to the Marconi patents. The Marconi Wireless Telegraph Company of America was incorporated in New Jersey [2] on November 8, 1899 as the first subsidiary company. It was granted the "sole right to use and exploit the Marconi ...
The paragraph :"Case against Marconi" in the entry "Invention of Radio" states that "However, he might have received a transatlantic signal at short wave frequencies (HF) because the early spark transmitters were only broadly tuned, and the Poldhu transmitter may have radiated sufficient energy in that part of the spectrum for a transatlantic transmission, if Marconi was using an untuned ...