Patents by Inventor Ruzhu Chen

Ruzhu Chen 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).

  • Virtual system administration environment for non-root user
    Patent number: 8412754
    Abstract: A virtual system environment in a computing system allows non-root users to perform administrative operations normally requiring root privileges. A virtual control module has a virtual file system with virtual directories corresponding to one or more of the system directories of a root file system. Each virtual directory contains one or more symbolic links symbolically linking to one or more system files as link targets. The symbolic links have non-root permissions that allow the non-root users to perform administrative operations in the virtual control module that delete, change or replace the symbolic links. A capability is provided to resolve the symbolic links within the virtual control module to allow the non-root users to execute the link targets via the symbolic links. One or more non-root users may be placed in the virtual control module by setting their apparent root directory to a root directory of the virtual file system.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: April 2, 2013
    Assignee: International Business Machines Corporation
    Inventors: Ruzhu Chen, Yinhe Cheng, Tzy-Hwa Kathy Tzeng
  • Virtual System Administration Environment For Non-Root User
    Publication number: 20110264718
    Abstract: A virtual system environment in a computing system allows non-root users to perform administrative operations normally requiring root privileges. A virtual control module has a virtual file system with virtual directories corresponding to one or more of the system directories of a root file system. Each virtual directory contains one or more symbolic links symbolically linking to one or more system files as link targets. The symbolic links have non-root permissions that allow the non-root users to perform administrative operations in the virtual control module that delete, change or replace the symbolic links. A capability is provided to resolve the symbolic links within the virtual control module to allow the non-root users to execute the link targets via the symbolic links. One or more non-root users may be placed in the virtual control module by setting their apparent root directory to a root directory of the virtual file system.
    Type: Application
    Filed: April 21, 2010
    Publication date: October 27, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ruzhu Chen, Yinhe Cheng, Tzy-Hwa Kathy Tzeng
  • Trypsin inhibitors with insecticidal properties obtained from Pentaclethra macroloba
    Patent number: 6525175
    Abstract: Compositions and methods for controlling pests, particularly insect pests, are provided. The compositions comprise proteins isolated from plants of the genus Pentaclethra which exhibit trypsin inhibiting activity. Nucleotide sequences encoding the proteins are also provided. Such sequences find use in transforming organisms for control of pests.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: February 25, 2003
    Assignees: Pioneer Hi-Bred International, Inc., Board of Regents for the University of Oklahoma
    Inventors: Ruzhu Chen, Karel R. Schubert, Thomas H. Czapla
  • Trypsin inhibitors with insecticidal properties obtained from Pentaclethra macroloba
    Patent number: 6384302
    Abstract: Compositions and methods for controlling pests, particularly insect pests, are provided. The compositions comprise proteins isolated from plants of the genus Pentaclethra which exhibit trypsin inhibiting activity. Nucleotide sequences encoding the proteins are also provided. Such sequences find use in transforming organisms for control of pests.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: May 7, 2002
    Assignee: Pioneer Hi-Bred International, Inc.
    Inventors: Ruzhu Chen, Karel R. Schubert, Thomas H. Czapla
  • Trypsin inhibitors with insecticidal properties obtained from pentaclethra macroloba
    Patent number: 5981722
    Abstract: Compositions and methods for controlling pests, particularly insect pests, are provided. The compositions comprise proteins isolated from plants of the genus Pentaclethra which exhibit trypsin inhibiting activity. Nucleotide sequences encoding the proteins are also provided. Such sequences find use in transforming organisms for control of pests.
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: November 9, 1999
    Assignee: Board of Regents for The University of Oklahoma
    Inventors: Ruzhu Chen, Karel R. Schubert, Thomas H. Czapla