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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]
Overall American Marconi's patent rights were sufficient to give it a leading role in the U.S., and in his review of radio industry legal disputes, W. Rupert MacLaurin noted that "The position of American Marconi was such that the threat of suit was often sufficient to cause an infringing firm to halt its operations."
[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.
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 for wireless technology was granted on 2 July that year. The company opened the world's first radio factory on ...
1943: the Supreme Court of the United States, in a case on radio patents involving the U.S. government vs the Marconi Company, restores some of the prior patents of Oliver Lodge, John Stone Stone, and Nicola Tesla.
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 ...
According to the New York Times, here's exactly how to play Strands: Find theme words to fill the board. Theme words stay highlighted in blue when found.
As part of worldwide expansion, in 1899 American Marconi was organized as a subsidiary company, holding the rights to use the Marconi patents in the United States and Cuba. [3] In 1912 it took over the assets of the bankrupt United Wireless Telegraph Company , and from that point forward it became the dominant radio communications company in ...