Patents by Inventor Victor M. Abreu

Victor M. Abreu 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).

  • Patent number: 6014376
    Abstract: A method for synchronizing base stations (104, 106, 108, 110) or radio ports in a communication system (100) such as a cordless or cellular telephone system uses a mobile station (114) or handset for synchronizing unsynchronized base stations. The mobile station (114) is first synchronized to a reference base station. The mobile station (114) then initiates communication with the unsynchronized base station and calculates a synchronization adjustment. The mobile station (114) transmits the synchronization adjustment to the unsynchronized base station which uses the synchronization adjustment to adjust its time base.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: January 11, 2000
    Assignee: Motorola, Inc.
    Inventors: Victor M. Abreu, Raul A. Pombo, Paul D. Marko, David L. Brown
  • Patent number: 5754956
    Abstract: A radiotelephone handset (120) includes an antenna (122) and receiver (124) for receiving a control channel from a plurality of base stations (102, 104, 106). A time division multiple access controller circuit (126) coupled to the receiver stores all received control channel information in a captured data buffer (134). Under control of a processor (128), the handset identifies as candidate suitable base stations those base stations having acceptable received signal strength, acceptable identity or system capability. From the candidates, the handset (120) chooses a suitable base station having acceptable signal quality, access rights and system capability and synchronizes communication with the suitable base station.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: May 19, 1998
    Assignee: Motorola, Inc.
    Inventors: Victor M. Abreu, Raul A. Pombo, Paul D. Marko, David L.. Brown