Patents by Inventor Li-Jun Chang

Li-Jun Chang 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).

  • Method and location server for determining a postion of a target device
    Patent number: 8918115
    Abstract: A method and location server (120) enable determining a position of a target device (105). The method includes receiving at the location server (120), from the target device (105), a distance message identifying a relative distance between the target device (105) and one or more base stations (115). Next, it is determined at the location server (120) that a primary positioning method is unavailable. In response to the primary positioning method being unavailable, a position of the target device (105) is determined using both a) an alternative positioning method and b) the relative distance between the target device (105) and the one or more base stations (115) that was identified in the distance message.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: December 23, 2014
    Assignee: Motorola Mobility LLC
    Inventors: Lai-Jun Zhang, Li-Jun Chang, Wen-Feng Ma
  • METHOD AND LOCATION SERVER FOR DETERMINING A POSTION OF A TARGET DEVICE
    Publication number: 20110059751
    Abstract: A method and location server (120) enable determining a position of a target device (105). The method includes receiving at the location server (120), from the target device (105), a distance message identifying a relative distance between the target device (105) and one or more base stations (115). Next, it is determined at the location server (120) that a primary positioning method is unavailable. In response to the primary positioning method being unavailable, a position of the target device (105) is determined using both a) an alternative positioning method and b) the relative distance between the target device (105) and the one or more base stations (115) that was identified in the distance message.
    Type: Application
    Filed: April 29, 2010
    Publication date: March 10, 2011
    Applicant: MOTOROLA, INC.
    Inventors: Lai-Jun Zhang, Li-Jun Chang, Wen-Feng Ma
  • METHOD AND DEVICE FOR NOTIFYING A LOCATION SERVICES CLIENT THAT A TARGET TERMINAL IS UNREACHABLE
    Publication number: 20110053606
    Abstract: A method and device enables notifying a location services client that a target terminal is unreachable. The method (400) includes receiving at a location server from the location services client a location reporting request message that requests information about the location of the target terminal (step 405). A positioning session is then established between the location server and the target terminal (step 410). It is then determined at the location server that a location report from the target terminal is overdue (step 420) and that the target terminal is unreachable (step 425). Finally, a notification message is transmitted from the location server to the location services client indicating that the target terminal is unreachable (step 430).
    Type: Application
    Filed: September 1, 2009
    Publication date: March 3, 2011
    Applicant: MOTOROLA, INC.
    Inventors: Xiao-Ming Yao, Li-Jun Chang, Lai-Jun Zhang
  • Support piece for decorative lamp
    Publication number: 20030012021
    Abstract: A support piece for at least one decorative lamp includes a body having at least one clip for holding the decorative lamp. And the body is formed with at least two connectors at ends thereof.
    Type: Application
    Filed: July 11, 2001
    Publication date: January 16, 2003
    Inventor: Li-Jun Chang
  • Ornamental bulb
    Patent number: D467361
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: December 17, 2002
    Inventor: Li-Jun Chang
  • Ornamental bulb
    Patent number: D481140
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: October 21, 2003
    Inventor: Li-Jun Chang