Patents by Inventor Frederick Michael Clayton

Frederick Michael Clayton 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).

  • High-speed digital subscriber lines
    Patent number: 5668802
    Abstract: A communications system employs a high-speed digital link with discrete multiple tone (DMT) the outward paths from a central transmitter/receiver to further transmitter/receivers receiving signals therefrom using one set of carrier frequency channels and the return signal paths using a different set of carrier frequency channels.In one form the central transmitter/receiver is an exchange and the further transmitter/receivers are subscribers connected to the exchange.
    Type: Grant
    Filed: November 7, 1994
    Date of Patent: September 16, 1997
    Assignee: GPT Limited
    Inventors: David Christopher Chalmers, Frederick Michael Clayton