Patents by Inventor Hsien-Wen Dai

Hsien-Wen Dai 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 apparatus for native method invocation and changing memory bank
    Patent number: 7536520
    Abstract: A method and apparatus for native method invocation and changing memory bank. A method return frame of a smart card stores the status of a native method invocation, and a memory bank flag points a program counter to a runtime environment (RE) memory bank or an operating system (OS) memory bank. First, upon a method invocation, the method return frame is pushed and set as a native method invocation when the method invocation is the native method invocation. Then, the memory bank flag points the program counter to the OS memory bank. Next, the method return frame is popped after the native method has been executed. Finally, the memory bank flag is changed to point the program counter to the RE memory bank if the method return frame is set as the native method invocation.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: May 19, 2009
    Assignee: Industrial Technology Research Institute
    Inventors: Hsien-Wen Dai, Lung-Chung Chang
  • Method and apparatus for native method invocation and changing memory bank
    Publication number: 20050204350
    Abstract: A method and apparatus for native method invocation and changing memory bank. A method return frame of a smart card stores the status of a native method invocation, and a memory bank flag points a program counter to a runtime environment (RE) memory bank or an operating system (OS) memory bank. First, upon a method invocation, the method return frame is pushed and set as a native method invocation when the method invocation is the native method invocation. Then, the memory bank flag points the program counter to the OS memory bank. Next, the method return frame is popped after the native method has been executed. Finally, the memory bank flag is changed to point the program counter to the RE memory bank if the method return frame is set as the native method invocation.
    Type: Application
    Filed: August 31, 2004
    Publication date: September 15, 2005
    Inventors: Hsien-Wen Dai, Lung-Chung Chang