Patents by Inventor Chung-Hwa H. Rao

Chung-Hwa H. Rao 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).

  • Using dynamically-linked libraries to add side effects to operations
    Patent number: 5572709
    Abstract: A backup file system which can be used without modification of application programs, the operating system, or the hardware. The backup file system is implemented by means of a dynamically-linkable replacement library and user-level processes on a primary computer system and a backup computer system. The dynamically-linkable replacement library has the same interfaces as a standard dynamically-linkable library of file operations. The functions in the replacement library perform the same file operations as their counterparts in the standard library; in addition, they send messages specifying the just-performed operation to a user-level process on the backup computer system. The user-level process executes the operation specified in the message on a backup file in the backup computer system. The files to be backed up are specified by identifying subtrees in the namespace of the primary file system; the subtrees make up a user-defined namespace.
    Type: Grant
    Filed: June 18, 1993
    Date of Patent: November 5, 1996
    Assignee: Lucent Technologies Inc.
    Inventors: Glenn S. Fowler, Yennun Huang, David G. Korn, Chung-Hwa H. Rao