Patents by Inventor Sang-Seo Lee

Sang-Seo Lee 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: 10998813
    Abstract: A modular multilevel converter (MMC) includes multiple converter arms, each converter arm having: N submodules connected to each other in series, N being an integer equal to or greater than 2; and a circuit opening unit connected to the N submodules in series to open a circuit of the converter arm, wherein the N submodules has n submodules including full-bridge circuits and N?n submodules including half-bridge circuits, n being less than N.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: May 4, 2021
    Assignees: HYOSUNG HEAVY INDUSTRIES CORPORATION
    Inventors: Hee Jin Kim, Dong Su Lee, Kyeon Hur, Jae Sik Kang, Sang Min Kim, Jong Seo Na
  • Publication number: 20210024368
    Abstract: Provided is a method for inhibiting extractant degradation by a diluent and an extractant input manner, the method including steps of: (a) determining and analyzing the total volume of the DSX solvent when the diluent and the extractant, which are the DSX solvents, are added in the DSX process and identifying the concentration of the extractant; (b) calculating an extractant concentration according to an amount of the diluent to be added based on the analysis value of step (a), and then adding the extractant; (c) determining the ratio between the extractants through analysis after adding the extractants; (d) adding the extractant to be needed when the ratio between extractants is out of the range; and (e) adding the diluent and analyzing the ratio between the extractants.
    Type: Application
    Filed: July 26, 2019
    Publication date: January 28, 2021
    Inventors: Jeon Woong AN, Youn Kyu YI, Sang Seo LEE, Seung Ho LEE
  • Patent number: 7035382
    Abstract: A voice mailbox management method in a voice mail system through a mutual notification function, between a user mobile telecommunications terminal and a voice mail server, using an extended short message service is provided. According to the voice mailbox management method, when a state change occurs in the voice mailbox of the voice mail server and the voice mailbox of the user mobile telecommunications terminal, a short message indicating the state change is sent to each other, and according to the received short message, the state of the voice mailbox in the voice mail server or the user mobile telecommunications terminal is modified, which enables to keep coherence in identical information in both voice mailboxes of the voice mail server and the user mobile telecommunications terminal.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: April 25, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyun-jung Shin, Sang-seo Lee
  • Patent number: 6937604
    Abstract: A device for data communications between a Wireless Application Protocol (WAP) terminal and a WAP server, and a data communication method thereof.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: August 30, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-seo Lee, Yong-suk Kim
  • Patent number: 6741851
    Abstract: A method for protecting data stored in a lost mobile terminal and a recording medium for storing the data are provided. In the method, a user who has lost the mobile terminal transmits protection control information to the lost mobile terminal, using a communication apparatus. The lost mobile terminal receives and discriminates the protection control information. User identifying information, which is included in the protection control information, is compared with information which is previously stored in the lost mobile terminal. When the user identifying information is identical to the information previously stored in the lost mobile terminal, the data which is stored in the lost mobile terminal is processed according to the user's data protection request which is included in the protection control information.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: May 25, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tae-seung Lee, Sang-seo Lee
  • Patent number: 6658251
    Abstract: In a wireless communication system provided with a WAP (wireless application protocol) server which can convert different data and protocols into available data and protocols between the wireless communication system and an Internet server, a method of designating a WAP server address and a wireless communication system are disclosed.
    Type: Grant
    Filed: July 28, 1999
    Date of Patent: December 2, 2003
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-seo Lee, Yong-Suk Kim, Hyung-min Nam
  • Patent number: 6628972
    Abstract: A power saving method of a mobile telephone. The power saving method includes the steps of: setting a power saving time period; if present time coincides with the set time, implementing a power saving function; and designating a cycle for checking a paging channel slot, and checking the paging channel slot by supplying a power of a battery to a radio frequency control part every designated cycle.
    Type: Grant
    Filed: August 2, 1999
    Date of Patent: September 30, 2003
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Sang-Seo Lee
  • Publication number: 20030163580
    Abstract: A data transmission protocol and apparatus using a short message service is provided. The data transmission protocol includes the steps of inserting a data connection service identifier into a user data field. Input message data is segmented into a plurality of short message data fields, and a segmented message data field, a field indicating the number of segmented short messages and a field indicating a current short message number, are inserted into the user data field. A short message field is generated using the user data field. The short message field is transmitted, thereby transmitting relatively large volume of data such as a simple picture and a rough sketch while using the short message service.
    Type: Application
    Filed: March 24, 2003
    Publication date: August 28, 2003
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Sang-Seo Lee
  • Patent number: 6519458
    Abstract: A wireless data transport method, and a mobile terminal and an interworking function (IWF) device therefor. In the wireless data transport method performed using a mobile terminal, an IWF device and a server, a dialing is performed in the mobile terminal using a predetermined command with an identifier including an IP (Internet Protocol) address, and then RLP (Radio Link Protocol) between the mobile terminal and the IWF device is synchronized to establish a circuit-switched data (CSD) channel according to the command. Then, PPP (Point-to-Point Protocol)/TCP (Transmission Control Protocol) is performed in the IWF device according to the identifier, and a network interface channel is then opened by an AT (ATtention) processing unit of the IWF device according to the IP address of the identifier. Therefore, the mobile terminal can be connected directly to a network interface which is an Internet connect port, using a CSD channel which is preferred by network service providers, not using a modem.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: February 11, 2003
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kang-hwan Oh, Sang-seo Lee
  • Patent number: 6490291
    Abstract: A device for data communications between a Wireless Application Protocol (WAP) terminal and a WAP server, and a data communication method thereof.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: December 3, 2002
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-seo Lee, Yong-suk Kim
  • Publication number: 20020105934
    Abstract: A device for data communications between a Wireless Application Protocol (WAP) terminal and a WAP server, and a data communication method thereof.
    Type: Application
    Filed: March 22, 2002
    Publication date: August 8, 2002
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang-Seo Lee, Yong-Suk Kim
  • Publication number: 20020068609
    Abstract: A wireless data transport method, and a mobile terminal and an interworking function (IWF) device therefor. In the wireless data transport method performed using a mobile terminal, an IWF device and a server, a dialing is performed in the mobile terminal using a predetermined command with an identifier including an IP (Internet Protocol) address, and then RLP (Radio Link Protocol) between the mobile terminal and the IWF device is synchronized to establish a circuit-switched data (CSD) channel according to the command. Then, PPP (Point-to-Point Protocol)/TCP (Transmission Control Protocol) is performed in the IWF device according to the identifier, and a network interface channel is then opened by an AT (Attention) processing unit of the IWF device according to the IP address of the identifier. Therefore, the mobile terminal can be connected directly to a network interface which is an Internet connect port, using a CSD channel which is preferred by network service providers, not using a modem.
    Type: Application
    Filed: July 19, 1999
    Publication date: June 6, 2002
    Inventors: KANG-HWAN OH, SANG-SEO LEE
  • Patent number: 6351637
    Abstract: A method of transmitting a caller's ID Number received by a home base station located within a predefined home base station area to a mobile instrument or station set to a cellular phone mode is provided.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: February 26, 2002
    Assignee: Samsung Electronics, Co., Ltd.
    Inventor: Sang-Seo Lee
  • Patent number: 6219556
    Abstract: A system and method for pursuing a missing cellular telephone are provided. The cellular telephone analyzes a control signal received from a mobile communication network. If the analyzed control signal corresponds to a missing mode setting signal, the cellular telephone enters a missing mode and transmits a position signal representing the current location at regular intervals. In the meantime, upon receipt of a missing mode release signal from the mobile communication network, the cellular telephone releases the missing mode. Further, the cellular telephone transmits the position signal at regular intervals beginning at termination of an incoming or outgoing call, when the missing cellular telephone answers the incoming call or makes the outgoing call in the missing mode.
    Type: Grant
    Filed: July 13, 1998
    Date of Patent: April 17, 2001
    Assignee: Samsung Electronics Co., Inc.
    Inventor: Sang-Seo Lee