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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 ...
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 ...
According to internal memos and workers at the plant, Tesla informed workers that “cost of living adjustments” would result in a bump in pay to $22 from $20 an hour on the low end, and to $34. ...
Morgan was to receive a controlling share in the company as well as half of all the patent income. Tesla's decision in July 1901 to scale up the facility and add his ideas of wireless power transmission to better compete with Guglielmo Marconi's new radio based telegraph system was met with Morgan's refusal to fund the changes. Wardenclyffe ...
A Tesla car could cost you from $45,000 to well over $200,000 as of June 2022, according to Motor Trend magazine. As of June 20, 2022, a new Tesla Model 3 will run about $48,000, but think twice ...
Tesla chief Elon Musk is ready to share the family jewels. Musk says he will allow access to the company's proprietary technology to any car company that wants to build an electric vehicle.
The matter from the old "Invention of Radio" text is all in History of radio, except for the Tesla and Marconi matter, which are in separate pages, as stated above. I have copied relevant matter about Tesla and Marconi into Great Radio Controversy, but I did not delete it from other pages. Anthony Appleyard 13:43, 22 September 2006 (UTC)