Patents by Inventor David Dean Ratcliff

David Dean Ratcliff 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).

  • Method of designing families of boost and cut filters, including treble and bass controls and graphic equalizers
    Publication number: 20030145025
    Abstract: A simplified design for a family of bass, treble and graphic equalizer filters (20). The filter design allows on-the-fly implementation of these simplified filter types, even in audio systems without extensive computation resources. The methodology includes designing a nominal filter, and decomposing this nominal filter into a simplified transfer function such that the family of treble boost, cut, and equalizer filters can be realized with moderate computational resources.
    Type: Application
    Filed: September 24, 2002
    Publication date: July 31, 2003
    Inventors: Rustin W. Allred, David Dean Ratcliff