Patents by Inventor Yongtao LIU

Yongtao LIU 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).

  • Publication number: 20190278748
    Abstract: A system for providing user access to electronic mail includes an email client and an email server. The email client receives and communicates a user interaction with an email message. The email server that receives the communication, determines whether the email message stored in a live database or in a backup storage. Upon determination that the email message is stored in a backup storage, the email server performs a message exchange with a backup storage system to perform the user-requested action.
    Type: Application
    Filed: May 29, 2019
    Publication date: September 12, 2019
    Inventors: Arun Prasad Amarendran, Jun H. Ahn, Tirthankar Chatterjee, Manas Bhikchand Mutha, Ho-Chi Chen, Prosenjit Sinha, Yongtao Liu
  • Patent number: 10324897
    Abstract: A system for providing user access to electronic mail includes an email client and an email server. The email client receives and communicates a user interaction with an email message The email server that receives the communication, determines whether the email message stored in a live database or in a backup storage. Upon determination that the email message is stored in a backup storage, the email server performs a message exchange with a backup storage system to perform the user-requested action.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: June 18, 2019
    Assignee: Commvault Systems, Inc.
    Inventors: Arun Prasad Amarendran, Jun H. Ahn, Tirthankar Chatterjee, Manas Bhikchand Mutha, Ho-chi Chen, Prosenjit Sinha, Yongtao Liu
  • Publication number: 20190065509
    Abstract: Techniques for providing data preview before recalling large data files are disclosed. In one aspect, a data file is made accessible while being offline by converting the data file from a native format to a preview format, storing the data file in the preview format in a primary storage that is locally available and moving, after the conversion to the preview format, the data file in the native format to a secondary storage. When a viewing request is received for the data file, the data file in the preview format is displayed to fulfill the viewing request.
    Type: Application
    Filed: October 24, 2018
    Publication date: February 28, 2019
    Inventors: Yongtao Liu, Paramasivam Kumarasamy, Prakash Varadharajan
  • Patent number: 10157184
    Abstract: Techniques for providing data preview before recalling large data files are disclosed. In one aspect, a data file is made accessible while being offline by converting the data file from a native format to a preview format, storing the data file in the preview format in a primary storage that is locally available and moving, after the conversion to the preview format, the data file in the native format to a secondary storage. When a viewing request is received for the data file, the data file in the preview format is displayed to fulfill the viewing request.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: December 18, 2018
    Assignee: Commvault Systems, Inc.
    Inventors: Yongtao Liu, Paramasivam Kumarasamy, Prakash Varadharajan
  • Patent number: 9984006
    Abstract: Data storage systems are disclosed for automatically generating encryption rules based on a set of training files that are known to include sensitive information. The system may use a number of heuristic algorithms to generate one or more encryption rules for determining whether a file includes sensitive information. Further, the system may apply the heuristic algorithms to the content of the files, as determined by using natural language processing algorithms, to generate the encryption rules. Moreover, systems are disclosed that are capable of automatically determining whether to encrypt a file based on the generated encryption rules. The content of the file may be determined using natural language processing algorithms and then the encryption rules may be applied to the content of the file to determine whether to encrypt the file.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: May 29, 2018
    Assignee: Commvault Systems, Inc.
    Inventors: Arun Prasad Amarendran, Tirthankar Chatterjee, Yun Yuan, Yongtao Liu
  • Publication number: 20180032446
    Abstract: Data storage systems are disclosed for automatically generating encryption rules based on a set of training files that are known to include sensitive information. The system may use a number of heuristic algorithms to generate one or more encryption rules for determining whether a file includes sensitive information. Further, the system may apply the heuristic algorithms to the content of the files, as determined by using natural language processing algorithms, to generate the encryption rules. Moreover, systems are disclosed that are capable of automatically determining whether to encrypt a file based on the generated encryption rules. The content of the file may be determined using natural language processing algorithms and then the encryption rules may be applied to the content of the file to determine whether to encrypt the file.
    Type: Application
    Filed: June 23, 2017
    Publication date: February 1, 2018
    Inventors: Arun Prasad AMARENDRAN, Tirthankar CHATTERJEE, Yun YUAN, Yongtao LIU
  • Patent number: 9727491
    Abstract: Data storage systems are disclosed for automatically generating encryption rules based on a set of training files that are known to include sensitive information. The system may use a number of heuristic algorithms to generate one or more encryption rules for determining whether a file includes sensitive information. Further, the system may apply the heuristic algorithms to the content of the files, as determined by using natural language processing algorithms, to generate the encryption rules. Moreover, systems are disclosed that are capable of automatically determining whether to encrypt a file based on the generated encryption rules. The content of the file may be determined using natural language processing algorithms and then the encryption rules may be applied to the content of the file to determine whether to encrypt the file.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: August 8, 2017
    Assignee: Commvault Systems, Inc.
    Inventors: Arun Prasad Amarendran, Tirthankar Chatterjee, Yun Yuan, Yongtao Liu
  • Patent number: 9720849
    Abstract: Data storage systems are disclosed for automatically generating encryption rules based on a set of training files that are known to include sensitive information. The system may use a number of heuristic algorithms to generate one or more encryption rules for determining whether a file includes sensitive information. Further, the system may apply the heuristic algorithms to the content of the files, as determined by using natural language processing algorithms, to generate the encryption rules. Moreover, systems are disclosed that are capable of automatically determining whether to encrypt a file based on the generated encryption rules. The content of the file may be determined using natural language processing algorithms and then the encryption rules may be applied to the content of the file to determine whether to encrypt the file.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: August 1, 2017
    Assignee: Commvault Systems, Inc.
    Inventors: Arun Prasad Amarendran, Tirthankar Chatterjee, Yun Yuan, Yongtao Liu
  • Publication number: 20160306751
    Abstract: Data storage systems are disclosed for automatically generating encryption rules based on a set of training files that are known to include sensitive information. The system may use a number of heuristic algorithms to generate one or more encryption rules for determining whether a file includes sensitive information. Further, the system may apply the heuristic algorithms to the content of the files, as determined by using natural language processing algorithms, to generate the encryption rules. Moreover, systems are disclosed that are capable of automatically determining whether to encrypt a file based on the generated encryption rules. The content of the file may be determined using natural language processing algorithms and then the encryption rules may be applied to the content of the file to determine whether to encrypt the file.
    Type: Application
    Filed: June 29, 2016
    Publication date: October 20, 2016
    Inventors: Arun Prasad AMARENDRAN, Tirthankar CHATTERJEE, Yun YUAN, Yongtao LIU
  • Publication number: 20160306984
    Abstract: Data storage systems are disclosed for automatically generating encryption rules based on a set of training files that are known to include sensitive information. The system may use a number of heuristic algorithms to generate one or more encryption rules for determining whether a file includes sensitive information. Further, the system may apply the heuristic algorithms to the content of the files, as determined by using natural language processing algorithms, to generate the encryption rules. Moreover, systems are disclosed that are capable of automatically determining whether to encrypt a file based on the generated encryption rules. The content of the file may be determined using natural language processing algorithms and then the encryption rules may be applied to the content of the file to determine whether to encrypt the file.
    Type: Application
    Filed: June 28, 2016
    Publication date: October 20, 2016
    Inventors: Arun Prasad AMARENDRAN, Tirthankar CHATTERJEE, Yun YUAN, Yongtao LIU
  • Patent number: 9405928
    Abstract: Data storage systems are disclosed for automatically generating encryption rules based on a set of training files that are known to include sensitive information. The system may use a number of heuristic algorithms to generate one or more encryption rules for determining whether a file includes sensitive information. Further, the system may apply the heuristic algorithms to the content of the files, as determined by using natural language processing algorithms, to generate the encryption rules. Moreover, systems are disclosed that are capable of automatically determining whether to encrypt a file based on the generated encryption rules. The content of the file may be determined using natural language processing algorithms and then the encryption rules may be applied to the content of the file to determine whether to encrypt the file.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: August 2, 2016
    Assignee: Commvault Systems, Inc.
    Inventors: Arun Prasad Amarendran, Tirthankar Chatterjee, Yun Yuan, Yongtao Liu
  • Patent number: 9297953
    Abstract: A graded refractive index bending-resistant multimode optical fiber includes a core layer and claddings. The core layer has a radius in a range of 20-50 ?m; refractive indexes being a graded refractive index distribution with a distribution exponent ? in a range of 1.89-1.97; and a maximum relative refractive index difference (RRID) ?1% max in a range of 0.9%-2.72%. The claddings has an inner cladding surrounding the core layer, an intermediate cladding surrounding the inner cladding and an outer cladding surrounding the inner cladding. The inner cladding has a radius in a range of 22-57 ?m, and an RRID ?2% in a range of ?0.02%-0.02%. The intermediate cladding is a pure quartz glass layer, and has a radius in a range of 32-60 ?m, and an RRID ?3% in a range of ?0.01%-0.01%.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: March 29, 2016
    Assignee: EVERPRO TECHNOLOGIES COMPANY LTD.
    Inventors: Song Wang, Zhipan Zhou, Yongtao Liu, Jin Xu, Mingfeng Fan, Shuqiang Zhang, Wei Wang
  • Publication number: 20160078245
    Abstract: Data storage systems are disclosed for automatically generating encryption rules based on a set of training files that are known to include sensitive information. The system may use a number of heuristic algorithms to generate one or more encryption rules for determining whether a file includes sensitive information. Further, the system may apply the heuristic algorithms to the content of the files, as determined by using natural language processing algorithms, to generate the encryption rules. Moreover, systems are disclosed that are capable of automatically determining whether to encrypt a file based on the generated encryption rules. The content of the file may be determined using natural language processing algorithms and then the encryption rules may be applied to the content of the file to determine whether to encrypt the file.
    Type: Application
    Filed: September 17, 2014
    Publication date: March 17, 2016
    Inventors: Arun Prasad AMARENDRAN, Tirthankar CHATTERJEE, Yun YUAN, Yongtao LIU
  • Patent number: 9282625
    Abstract: A plasma resonant cavity, including a cylindrical resonant cavity casing, cutoff waveguides, and a waveguide inlet circumferentially formed on the cylindrical resonant cavity casing. The cutoff waveguides are arranged at two ends of the cylindrical resonant cavity casing and employ a movable end cover structure. An intermediate through hole is formed on each cutoff waveguide with the movable end cover structure, and a raised round table is arranged on an inner end surface of the cutoff waveguide and configured with the resonant cavity.
    Type: Grant
    Filed: October 9, 2012
    Date of Patent: March 8, 2016
    Assignee: YANGTZE OPTICAL FIBRE AND CABLE COMPANY, LTD.
    Inventors: Zhenyu Li, Songtao Lu, Shanpei Liu, Shengya Long, Gaoqing Lei, Yongtao Liu
  • Patent number: 9170369
    Abstract: A graded refractive index bending-resistant multimode optical fiber includes a core layer and claddings. The core layer has a radius in a range of 22.5-27.5 ?m; refractive indexes being a gradient-graded refractive index distribution with a distribution exponent ? in a range of 1.99-2.06; and a maximum relative refractive index difference (RRID) ?1% max in a range of 0.9%-1.3%. The claddings has an inner cladding surrounding the core layer, an intermediate cladding surrounding the inner cladding and an outer cladding surrounding the inner cladding. The inner cladding has a radius in a range of 25.5-34.5 ?m, and an RRID ?2% in a range of ?0.02%-0.02%. The intermediate cladding is a pure quartz glass layer, and has a radius in a range of 30.5-49.5 ?m, and an RRID ?3% in a range of ?0.01%-0.01%. The outer cladding has a radius in a range of 61.5-63.5 ?m, and an RRID ?4% is in a range of ?0.20%-0.30%.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: October 27, 2015
    Assignee: EVERPRO TECHNOLOGIES COMPANY LTD.
    Inventors: Song Wang, Zhipan Zhou, Yongtao Liu, Jin Xu, Mingfeng Fan, Shuqiang Zhang, Wei Wang
  • Publication number: 20150212889
    Abstract: A system for providing user access to electronic mail includes an email client and an email server. The email client receives and communicates a user interaction with an email message The email server that receives the communication, determines whether the email message stored in a live database or in a backup storage. Upon determination that the email message is stored in a backup storage, the email server performs a message exchange with a backup storage system to perform the user-requested action.
    Type: Application
    Filed: January 27, 2015
    Publication date: July 30, 2015
    Inventors: Arun Prasad Amarendran, Jun H. Ahn, Tirthankar Chatterjee, Manas Bhikchand Mutha, Ho-chi Chen, Prosenjit Sinha, Yongtao Liu
  • Patent number: 9086524
    Abstract: A method for manufacturing an optical fiber preform, including: a) providing a lining tube as a substrate tube, and doping and depositing by a PCVD or an MCVD process; b) in the reacting gas of silicon tetrachloride and oxygen, introducing a fluorine-containing gas for fluorine doping, introducing germanium tetrachloride for germanium doping, ionizing the reacting gas in the lining tube through microwaves to form plasma, depositing the plasma on the inner wall of the lining tube in the form of glass; c) after the completion of deposition, processing the deposited lining tube into a solid core rod by melting contraction through an electric heating furnace; d) sleeving the solid core rod into a pure quartz glass jacketing tube and manufacturing the two into an optical fiber preform; and e) allowing the effective diameter d of the optical fiber preform to become between 95 and 205 mm.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: July 21, 2015
    Assignee: Yangtze Optical Fibre and Cable Joint Stock Limited Company
    Inventors: Chen Yang, Qingrong Han, Weijun Tong, Jie Luo, Yongtao Liu
  • Patent number: 9052435
    Abstract: A bending-resistant large core diameter high numerical aperture multimode fiber includes a core and a cladding surrounding the core. The core has a radius R1 in a range of 28 to 50 microns, a refractive index profile of a parabola shape with ? being in a range of 1.9 to 2.2, and a maximum relative refractive index difference ?1% max being in a range of 1.9% to 2.5%. The cladding includes an inner cladding and/or a trench cladding, and an outer cladding disposed from the inner to the outer in sequence. The radius R2 of the inner cladding is in a range of 28 to 55 microns, and the relative refractive index difference ?2% is ?0.1% to 0.1%. The radius R3 of the trench cladding is in a range of 28 to 60 microns, and the relative refractive index difference ?3% is in a range of ?0.15% to ?0.8%.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: June 9, 2015
    Assignee: EVERPRO TECHNOLOGIES COMPANY LTD.
    Inventors: Shuqiang Zhang, Yongtao Liu, Song Wang, Zhenbao He, Jin Xu
  • Publication number: 20150117827
    Abstract: A graded refractive index bending-resistant multimode optical fiber includes a core layer and claddings. The core layer has a radius in a range of 22.5-27.5 ?m; refractive indexes being a gradient-graded refractive index distribution with a distribution exponent ? in a range of 1.99-2.06; and a maximum relative refractive index difference (RRID) ?1% max in a range of 0.9%-1.3%. The claddings has an inner cladding surrounding the core layer, an intermediate cladding surrounding the inner cladding and an outer cladding surrounding the inner cladding. The inner cladding has a radius in a range of 25.5-34.5 ?m, and an RRID ?2% in a range of ?0.02%-0.02%. The intermediate cladding is a pure quartz glass layer, and has a radius in a range of 30.5-49.5 ?m, and an RRID ?3% in a range of ?0.01%-0.01%. The outer cladding has a radius in a range of 61.5-63.5 ?m, and an RRID ?4% is in a range of ?0.20%-0.30%.
    Type: Application
    Filed: November 19, 2014
    Publication date: April 30, 2015
    Inventors: Song Wang, Zhipan Zhou, Yongtao Liu, Jin Xu, Mingfeng Fan, Shuqiang Zhang, Wei Wang
  • Publication number: 20150104140
    Abstract: A graded refractive index bending-resistant multimode optical fiber includes a core layer and claddings. The core layer has a radius in a range of 20-50 ?m; refractive indexes being a gradient-graded refractive index distribution with a distribution exponent a in a range of 1.89-1.97; and a maximum relative refractive index difference (RRID) ?1% max in a range of 0.9%-2.72%. The claddings has an inner cladding surrounding the core layer, an intermediate cladding surrounding the inner cladding and an outer cladding surrounding the inner cladding. The inner cladding has a radius in a range of 22-57 ?m, and an RRID ?2% in a range of ?0.02%-0.02%. The intermediate cladding is a pure quartz glass layer, and has a radius in a range of 32-60 ?m, and an RRID ?3% in a range of ?0.01%-0.01%.
    Type: Application
    Filed: November 21, 2014
    Publication date: April 16, 2015
    Inventors: Song Wang, Zhipan Zhou, Yongtao Liu, Jin Xu, Mingfeng Fan, Shuqiang Zhang, Wei Wang