Patents by Inventor Stefan Asthoff

Stefan Asthoff 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).

  • METHODS AND ARRANGEMENT FOR CONDUCTING TELEPHONE CONVERSATIONS ON SEVERAL MOBILE PHONE NETWORKS
    Publication number: 20090117939
    Abstract: A mobile radio (1) has a housing (2) with a recess (15) which is associated with the housing rear face (11) for a specific SIM card (12). Furthermore, however, this rear face has further associated recesses (18) in which further SIM cards (12, 12?, 12?, 12?, 12?) can be inserted in order in this way to provide the user with the capability to dial into specific radio networks, which allow network-internal calls, by activating or addressing the appropriate SIM cards (12). IC charges and the like are thus no longer incurred, with further operational reliability advantages also being provided.
    Type: Application
    Filed: April 3, 2007
    Publication date: May 7, 2009
    Inventor: Stefan Asthoff