Patents by Inventor Charles L. Wilkinson

Charles L. Wilkinson 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).

  • Automatic telephone line monitoring and selection apparatus and method
    Patent number: 5392341
    Abstract: An automatic telephone line call monitoring and line assignment device is installed at a subscriber location to assign incoming calls on a master ringing line to a user selected slave line in response to taking that line off-hook. A programmable logic unit detects incoming calls, off-hook lines, and directs the device to automatically dial a central office call intercept service to move incoming calls off the master line to the slave lines.
    Type: Grant
    Filed: June 11, 1992
    Date of Patent: February 21, 1995
    Inventors: Charles L. Wilkinson, Roberto Schipp