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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]
This "four sevens" patent — so named because Marconi's U.S. patent No. 763,772 was a counterpart to the original filing, British patent No. 7,777 — was also found to be invalid, with the court ruling that it had been anticipated by John Stone Stone's U.S. patent 714,756 as well as those by Lodge and Tesla. The verdict stated that “Marconi ...
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 ...
Using Tesla's internal salary database, BI looked at median base pay for the roughly 13,000 full-time, salaried, US-based employees across the internal job categories that Tesla uses to define ...
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 ...
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 ...
Donald Verrilli, a lawyer for an induvial stockholder who owns more than 19,000 Tesla shares, suggested that it would be wrong for the lone shareholder who filed the lawsuit to thwart the will of ...
[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.