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Tord Wingren is a Swedish inventor, entrepreneur, and scientist and holder of 28 patents relating to wireless communication, technology, and the implications of light on the human body. [1] He developed Bluetooth technology while working with Ericsson Mobile Communications , and is the co-founder of several technology companies including ...
Wireless telegraphy or radiotelegraphy is the transmission of text messages by radio waves, analogous to electrical telegraphy using cables. [1] [2] Before about 1910, the term wireless telegraphy was also used for other experimental technologies for transmitting telegraph signals without wires.
The electric telephone was invented in the 1870s, based on earlier work with harmonic (multi-signal) telegraphs. The first commercial telephone services were set up in 1878 and 1879 on both sides of the Atlantic in the cities of New Haven, Connecticut in the US and London, England in the UK.
The first account of communication by Popov was a ... waves for actual wireless communication before mid-1896. ... very first radiogram using the device he invented ...
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]
That first cell phone began a fundamental technology and communications market shift to making phone calls to a person instead of to a place. [ 6 ] [ 19 ] Bell Labs had introduced the idea of cellular communications in 1947, but their first systems were limited to car phones which required roughly 30 pounds (12 kg) of equipment in the trunk. [ 21 ]
The first person to use resonant circuits in a radio application was Nikola Tesla, who invented the resonant transformer in 1891. [59] At a March 1893 St. Louis lecture [60] he had demonstrated a wireless system that, although it was intended for wireless power transmission, had many of the elements of later radio communication systems.
Wireless communication Irving " Al " Gross ( / ɡ r oʊ s / ; February 22, 1918 – December 21, 2000) was a pioneer in mobile wireless communication . He created and patented many communications devices, specifically in relation to an early version of the walkie-talkie , [ 1 ] Citizens' Band radio , [ 2 ] the telephone pager [ 2 ] and the ...