Patents by Inventor Ralf Hedemann

Ralf Hedemann 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).

  • Procedure for blocking certain international mobile subscriber identity ranges of prepaid and postpaid smart cards
    Publication number: 20010030235
    Abstract: Independent use from each other of mobile-radio participant-identification cards and mobile-radio end devices sold as a package is made possible by a procedure and a mobile-radio end device that permit calling with the mobile-radio end device with the inserted mobile-radio participant-identification card only when certain digits of the IMSI of the mobile-radio participant-identification card lie within value ranges stored in the end device.
    Type: Application
    Filed: March 16, 2001
    Publication date: October 18, 2001
    Applicant: Atecs Mannesmann AG
    Inventors: Ralf Hedemann, Ralf Lubjahn