[DOC] [TLE] Lee de Forest - Wikipedia [PAR] Lee de Forest (August 26, 1873  June 30, 1961) was an American inventor, self-
described "Father of Radio", and a pioneer in the development of sound-on-film 
recording used for motion pictures. He had over 180 patents, but also a 
tumultuous careerhe boasted that he .... With radio research his main priority, 
de Forest next took a night teaching... [DOC] [TLE] Lee De Forest - Engineering and Technology History Wiki [PAR] Feb 3, 2016 ... Lee de Forest, IRE President, 1930, patented the Audion, which is a three 
element vacuum tube that was a sensitive wireless receptor, in 1907. ... there 
until he received a doctorate in physics for his work on radio waves. De ... De 
Forest was a pioneer broadcaster in addition to an inventor and engineer. He... [DOC] [TLE] Old Site Lee de Forest as early radio broadcaster - Lee de Forest.org [PAR] CLICK HERE FOR A NEW LOOK AND MORE COMPLETE INFORMATION ... 
Judging by this early performance, Lee de Forest should have won the race for 
the ... Throughout his early career he bordered on the edge of the activities of 
broadcasting, ... to the basic invention of all radio and television, the vacuum tube
. [DOC] [TLE] Making Wireless History With De Forest - United States Early Radio ... [PAR] The American De Forest Wireless Telegraph Company was not the kind of firm ... 
His use here of Fessenden's electrolytic detector would be later be repeated, and 
... only a few of us can share with Dr. Lee De Forest, the famous radio inventor. ... 
De Forest in his elementary pioneer work; in the building of his first few "audion... [DOC] [TLE] What Everyone Should Know About Radio History (1922) [PAR] Along one bank of the river he laid a wire in which were contained his sending 
battery ... Many more experimenters than the few mentioned here worked in this 
field, ... This is true wireless telegraphy, as much so as the type used to-day for 
radio ..... In 1907 De Forest made his real contribution to the radio art; he 
somehow... [DOC] [TLE] Lee De Forest | Pronk Papers [PAR] Lee De Forest solved this problem by his invention of the audion that amplified 
weak radio signals. ... GE had also improved the vacuum tube used in radios. [DOC] [TLE] Lee de Forest: King of Radio, Television, and Film: Mike Adams ... [PAR] Lee de Forest: King of Radio, Television, and Film [Mike Adams] on Amazon.com. 
... While he received many patents for his process, he was initially ignored by... [DOC] [TLE] Radio's First Message -- Fessenden and Marconi - IEEE Canada [PAR] According to Marconi, he was an amateur in radio: in fact this was far from the 
truth. ... with wireless telephony to others, Reginald Fessenden and Lee de 
Forest. ..... For his transatlantic experiment in 1901 Marconi had two types of 
receivers, and three ... De Forest patented his audion, the first three-element 
valve in 1907. [DOC] [TLE] Lee De Forest - Electrical Engineer and inventor of the Audion Tube ... [PAR] The Audion: Lee de Forest held numerous patents on the technology of radio, ... 
In 1907 he invented the Audion, the three-element vacuum tube which became 
...... Each one is a work of industrial art; I had never before seen anything like 
them! ..... His theory of electromagnetic induction eventually became "Faraday's 
Law". [DOC] [TLE] Technical factors affecting CW radio communication in ... - MHS Blogs [PAR] The diode valve used as a radio wave detector was patented by John ... The US 
engineer, Lee de Forest, believed he could make a more sensitive ... For several 
years, from 1907 to 1913, the audion was only used as a radio .... Fessenden 
was one of the pioneers of radio telephony and his ideas were .... From here 
nickel. [DOC] [TLE] In 1906 - Reginald A. Fessenden transmitted the first audio ... [PAR] In 1907 /here on photo/ Lee DeForest - The 2nd Disc Jockey? Already known 
as the father of radio

Question: Radio pioneer Lee De Forest is seen here with his Audion, this type of tube which he patented in 1907
Answer: Vacuum tube