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- Oct 7, 2002
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In 1907 Dr. De Forest patents the audion tube. Dr. Lee De Forest, widely regarded as the "father of radio and the grandfather of television," patented the Audion radio tube, which turned radio into a practical transmission device for voice and music. Previously, wireless technology was primarily used for telegraph signals. Unfortunately, De Forest's business partners were prone to fraud: The De Forest Radio Telephone Company began to collapse in 1909, leading to De Forest's indictment for promoting a "worthless device"--the Audion tube. De Forest was later acquitted. Several years later, De Forest devised a way to connect a series of Audion tubes in order to amplify radio signals far beyond what a single tube could do. This process was essential in the development of radio and long-distance telephone. De Forest, despairing of business success, sold his patents at bargain-basement prices to several companies, including American Telephone and Telegraph, which used the repeating Audion tube as a key component in long-distance telephone technology.
My number guess is: 313
My number guess is: 313