Patents by Inventor Jung Yul Choi

Jung Yul Choi 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).

  • Patent number: 9862474
    Abstract: Provided is a ventilating apparatus for a drill ship, which allows a drill ship sailing around an arctic region to maintain appropriate temperature and pressure. The ventilating apparatus for the drill ship includes: a derrick forming an enclosed space blocked from the exterior; a moonpool formed under the derrick; an air supply device supplying outside air to the moonpool or the derrick; and an air exhaust device exhausting the supplied outside air out of the top of the derrick.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: January 9, 2018
    Assignees: DAEWOO SHIPBUILDING & MARINE ENGINEERING CO., LTD., TRANSOCEAN SEDCO FOREX VENTURES LIMITED
    Inventors: Keum Dae Choo, Yu Young Lee, Jung Yul Choi, Jung Soo Kang, D. Scott Brittin
  • Patent number: 9376199
    Abstract: Provided is an arctic ship with a derrick, which can stably maintain an internal environment of an enclosed derrick. The arctic ship with a derrick includes: the derrick forming an enclosed space blocked from outside air; a moonpool coupled to a lower portion of the derrick to communicate with the derrick and blocked from the outside air; and an air supply/exhaust device installed to communicate an inner space of the derrick or the moonpool with the exterior, wherein air condition of the inner space is maintained or controlled at a predetermined range by the air supply/exhaust device.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: June 28, 2016
    Assignees: Daewoo Shipbuilding & Marine Engineering Co., Ltd., Transocean Sedco Forex Ventures Limited
    Inventors: Keum Dae Choo, Yu Young Lee, Jung Yul Choi, Jung Soo Kang, D. Scott Brittin
  • Publication number: 20130269584
    Abstract: Provided is an arctic ship with a derrick, which can stably maintain an internal environment of an enclosed derrick. The arctic ship with a derrick includes: the derrick forming an enclosed space blocked from outside air; a moonpool coupled to a lower portion of the derrick to communicate with the derrick and blocked from the outside air; and an air supply/exhaust device installed to communicate an inner space of the derrick or the moonpool with the exterior, wherein air condition of the inner space is maintained or controlled at a predetermined range by the air supply/exhaust device.
    Type: Application
    Filed: June 22, 2011
    Publication date: October 17, 2013
    Inventors: Keum Dae Choo, Yu Young Lee, Jung Yul Choi, Jung Soo Kang, D. Scott Brittin
  • Publication number: 20130273823
    Abstract: Provided is a ventilating apparatus for a drill ship, which allows a drill ship sailing around an arctic region to maintain appropriate temperature and pressure. The ventilating apparatus for the drill ship includes: a derrick forming an enclosed space blocked from the exterior; a moonpool formed under the derrick; an air supply device supplying outside air to the moonpool or the derrick; and an air exhaust device exhausting the supplied outside air out of the top of the derrick.
    Type: Application
    Filed: June 22, 2011
    Publication date: October 17, 2013
    Inventors: Keum Dae Choo, Yu Young Lee, Jung Yul Choi, Jung Soo Kang, D. Scott Brittin
  • Patent number: 8111990
    Abstract: Provided is an apparatus for transferring optical data in an optical switching system using time synchronization. The apparatus performs time synchronization on optical data to input the optical data at regular intervals through fiber delay line for time synchronization respectively disposed on input ports. Therefore, the apparatus can efficiently reduce a data blocking rate in comparison with a conventional optical switching system using an asynchronous electric buffer without a synchronous process, and achieve the same performance as conventional asynchronous technology despite using fewer wavelength converters and buffers, thus reducing system cost. In addition, using dynamic time synchronization modules, the apparatus performs time synchronization for minute time variation due to an environment such as temperature.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: February 7, 2012
    Assignee: ICU Research and Industrial Cooperation Group
    Inventors: June Koo Rhee, Ji Hwan Kim, Jung Yul Choi, Min Ho Kang
  • Publication number: 20100142942
    Abstract: Provided is an apparatus for transferring optical data in an optical switching system using time synchronization. The apparatus performs time synchronization on optical data to input the optical data at regular intervals through fiber delay line for time synchronization respectively disposed on input ports. Therefore, the apparatus can efficiently reduce a data blocking rate in comparison with a conventional optical switching system using an asynchronous electric buffer without a synchronous process, and achieve the same performance as conventional asynchronous technology despite using fewer wavelength converters and buffers, thus reducing system cost. In addition, using dynamic time synchronization modules, the apparatus performs time synchronization for minute time variation due to an environment such as temperature.
    Type: Application
    Filed: February 8, 2007
    Publication date: June 10, 2010
    Applicant: ICU RESEARCH AND INDUSTRIAL COOPERATION GROUP
    Inventors: June Koo Rhee, Ji Hwan Kim, Jung Yul Choi, Min Ho Kang
  • Patent number: 7620044
    Abstract: In an apparatus and method for transferring data bursts in an optical burst switching network, a control module connected between demultiplexers and multiplexers obtains information in control packets of data bursts to sort and confirm service classes of the data bursts according to delay time and blocking rate. A switching unit switches the data bursts to an output port of a corresponding destination node. A first buffer delays data bursts from the control module once by a preset delay time according to output resource availability and sends them to the output port when the data bursts are sensitive to delay time. A second buffer circulates and delays the sorted and confirmed data bursts up to a preset limit according to output resource availability and then sends the data bursts to the output port when the data bursts are insensitive to delay time.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: November 17, 2009
    Assignee: Research and Industrial Cooperation Group
    Inventors: Jung Yul Choi, Min Ho Kang
  • Publication number: 20070242691
    Abstract: An apparatus and method for transferring optical data in an optical switching system are provided. When optical data input to a node are in contention, the optical data are converted from optical signals to electrical signals and temporarily stored. When an output resource is available, the stored optical data are converted to the available output resource and transmitted to a desired destination node. This overcomes the buffering depth limit that is observed when a conventional optical fiber delay line is used. Accordingly, an optical data loss rate can be reduced such that optical data can be efficiently transferred. Further, non-contending optical data are directly delivered to output resource by the switching unit, thereby reducing the cost of optical/electrical conversion and wavelength conversion and enabling the apparatus to be implemented at low cost.
    Type: Application
    Filed: January 9, 2007
    Publication date: October 18, 2007
    Applicant: Research and Industrial Cooperation Group
    Inventors: June Koo Rhee, Jung Yul Choi, Ji Hwan Kim, Min Ho Kang
  • Publication number: 20070189285
    Abstract: An apparatus and method for transferring data bursts in an optical burst switching network are provided.
    Type: Application
    Filed: July 31, 2006
    Publication date: August 16, 2007
    Applicant: Research and Industrial Cooperation Group
    Inventors: Jung Yul Choi, Min Ho Kang
  • Publication number: 20020089712
    Abstract: The present invention relates to protection and restoration method for MPXS in optical mesh networks, particularly to protection and restoration method which can find and restore fast failures by configuring routing table with working label and protection label when failures occur at links or nodes.
    Type: Application
    Filed: February 13, 2001
    Publication date: July 11, 2002
    Inventors: Min Ho Kang, Jung Yul Choi, Byung Jae Kim