Patents by Inventor Wei W. Zhao

Wei W. Zhao 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).

  • Clock signal controller
    Patent number: 10587251
    Abstract: The present invention provides a clock signal controller structure. The invention allows for the large-skew clock signals to be converted into small-skew clock signals. The technical solution of the present invention may be adopted to synchronize two large-skew clock signals.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: March 10, 2020
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ou He, Yan S H He, Wei A W Zhao
  • Clock signal controller
    Patent number: 10141920
    Abstract: The present invention provides a clock signal controller structure. The invention allows for the large-skew clock signals to be converted into small-skew clock signals. The technical solution of the present invention may be adopted to synchronize two large-skew clock signals.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: November 27, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ou He, Yan S H He, Wei A W Zhao
  • Adaptive guard band for multiple heads of a data storage device
    Patent number: 9093093
    Abstract: An adaptive guard band scheme is disclosed for a data storage device. In illustrated embodiments, the adaptive guard band scheme formats different guard band cylinders and track zeros for different heads depending upon a contact cylinder of the different heads. In an illustrative embodiment, the adaptive guard band scheme utilizes the contact cylinders for the heads and a no fly cylinder to determine track zero(s) and extended data zone(s) for select heads.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: July 28, 2015
    Assignee: Seagate Technology LLC
    Inventors: Subra Nagarajan, Joshua W. Christensen, Wei W. Zhao, Daniel D. Dittmer, Richard Garner Cox
  • ADAPTIVE GUARD BAND FOR MULTIPLE HEADS OF A DATA STORAGE DEVICE
    Publication number: 20150116863
    Abstract: An adaptive guard band scheme is disclosed for a data storage device. In illustrated embodiments, the adaptive guard band scheme formats different guard band cylinders and track zeros for different heads depending upon a contact cylinder of the different heads. In an illustrative embodiment, the adaptive guard band scheme utilizes the contact cylinders for the heads and a no fly cylinder to determine track zero(s) and extended data zone(s) for select heads.
    Type: Application
    Filed: October 25, 2013
    Publication date: April 30, 2015
    Inventors: Subra A. Nagarajan, Joshua W. Christensen, Wei W. Zhao, Daniel D. Dittmer, Richard Garner Cox