Previous Page: Lee De Forest found an allusion that enable him to construct the long sought after detector of electromagnetic radiation that  John A. Fleming's invention was not of real practical use. The Fleming so called electronic valve was a useless. innovation compared to what Lee De Forest Valve Amps. The most serious limitation of the Fleming valve was that it was relatively insensitive to changes in the concentration of occurrences in electromagnetic radiation. Furthermore, the Fleming valve could only act as a rectifier and therefore, could not create any kind of  amplification. Lee De Forest effortlessly developed the Fleming's invention which was actually the Edison Effect that was discovered by Thomas Edison.

De Forest  uncomplicatedly inserted a third electrode to the Edison Effect between the cathode and the anode to create the Audion tube amplifier. The Audion Tube or Triode provided the amplifying and switching functions that would later be performed by the transistor and other numerous electronic circuits. The electronic transistorised circuits that replaced The Audion Tube which eventually became a stunning commercial success in the electronics market place. Nonetheless, Lee De Forest laid claims to more than 300 patents. Lee De Forest was plagued with failures as well, but that was because no one sought after his developments. In addition, he was frequently involved in patent lawsuits.