Patents by Inventor William Mayfield

William Mayfield 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).

  • Multiple satellite mobile communications method and apparatus for hand-held terminals
    Patent number: 6337980
    Abstract: A novel mobile satellite communications technique for hand-held terminals includes a satellite system having a plurality of individual satellites all in communication with a ground telecommunications hub. A signal processed by the ground telecommunications hub is radiated through multiple paths to a plurality of the individual satellites in the satellite constellation simultaneously. The radiated signal is then re-radiated by the plurality of individual satellites to a mobile satellite terminal that receives the re-radiated signal from the plurality of individual satellites simultaneously such that the same frequency spectrum may be re-used by another mobile user.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: January 8, 2002
    Assignee: Hughes Electronics Corporation
    Inventors: Donald C. D. Chang, John I. Novak, III, Kar Yung, Frank A. Hagen, Ming U. Chang, William Mayfield
  • Multiple satellite mobile communications method and apparatus for hand-held terminals
    Patent number: 6295440
    Abstract: A novel mobile satellite communications technique for hand-held terminals includes a satellite system having a plurality of individual satellites all in communication with a ground telecommunications hub. A signal processed by the ground telecommunications hub is radiated through multiple paths to a plurality of the individual satellites in the satellite constellation simultaneously. The radiated signal is then re-radiated by the plurality of individual satellites to a mobile satellite terminal that receives the re-radiated signal from the plurality of individual satellites simultaneously such that the same frequency spectrum may be re-used by another mobile user.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: September 25, 2001
    Assignee: Hughes Electronics Corporation
    Inventors: Donald C. D. Chang, John I. Novak, III, Kar Yung, Frank A. Hagen, Ming U. Chang, William Mayfield
  • Multiple satellite mobile communications method and apparatus for hand-held terminals
    Publication number: 20010000167
    Abstract: A novel mobile satellite communications technique for hand-held terminals includes a satellite system having a plurality of individual satellites all in communication with a ground telecommunications hub. A signal processed by the ground telecommunications hub is radiated through multiple paths to a plurality of the individual satellites in the satellite constellation simultaneously. The radiated signal is then re-radiated by the plurality of individual satellites to a mobile satellite terminal that receives the re-radiated signal from the plurality of individual satellites simultaneously such that the same frequency spectrum may be re-used by another mobile user.
    Type: Application
    Filed: November 30, 2000
    Publication date: April 5, 2001
    Applicant: Hughes Electronics Corporation
    Inventors: Donald C.D. Chang, John I. Novak, Kar Yung, Frank A. Hagen, Ming U. Chang, William Mayfield