Patents by Inventor Roy R. Tillis

Roy R. Tillis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System and method for processing audio signals
    Patent number: 8189811
    Abstract: An audio signal is processed by passing it through a speaker, the cone of which is mechanically connected to a moving sleeve. A coil is wrapped around the sleeve. There is a metal shaft displaced inside of the sleeve. The shaft is connected to a magnet. Thus, movement of the speaker cone causes the coil to move through a magnetic field which creates a voltage across the coil which is subtracted from the original audio signal to produce a processed output.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: May 29, 2012
    Inventor: Roy R. Tillis