Patents by Inventor Wai Alan Chan

Wai Alan Chan 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 for enforcing a time limited software license in a mobile communication device
    Patent number: 6889212
    Abstract: A mobile communication device (104) loads an application bundle (200), which includes a software application (202) and an indication of a time limited license (206). To enforce the time limited license, the mobile communication device, upon attempting to invoke the application code (310), obtains a secure time reading (312). It is contemplated that a secure time server (116) may be used to facilitate license enforcement. Once the secure time reading is obtained, the mobile communication device compares the time with the license period, and executes the code only if the time reading is within the license period.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: May 3, 2005
    Assignee: Motorola, Inc.
    Inventors: Alex C. Wang, Wai Alan Chan, Jy-Han Lin, Robert L. Geiger, Ronald R. Smith, Sanjay Wanchoo