Patents by Inventor In-Sun CHA

In-Sun CHA 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: 11961867
    Abstract: Various aspects of the present disclosure provide a semiconductor device, for example comprising a finger print sensor, and a method for manufacturing thereof. Various aspects of the present disclosure may, for example, provide an ultra-slim finger print sensor having a thickness of 500 ?m or less that does not include a separate printed circuit board (PCB), and a method for manufacturing thereof.
    Type: Grant
    Filed: June 10, 2022
    Date of Patent: April 16, 2024
    Assignee: Amkor Technology Singapore Holding Pte. Ltd.
    Inventors: Jin Young Kim, No Sun Park, Yoon Joo Kim, Seung Jae Lee, Se Woong Cha, Sung Kyu Kim, Ju Hoon Yoon
  • Publication number: 20240107373
    Abstract: Provided is a communication method and an electronic device performing the communication method. The communication method includes establishing a wireless connection for transmission of data, generating a medium access control (MAC) frame including a header formed only of a frame control field based on a type of the data, and transmitting the MAC frame including the data.
    Type: Application
    Filed: August 7, 2023
    Publication date: March 28, 2024
    Inventors: Jae Sun CHA, Tae Joon PARK, Eun-Hee KIM, Kyeseon LEE
  • Patent number: 11895603
    Abstract: An operation method of an access point (AP) and a terminal, in a wireless time sensitive network (WTSN), may comprise: receiving, by an AP, an uplink frame from a first terminal; generating compensation indication information for compensation to be performed in the first terminal according to channel information between the first terminal and the AP estimated based on the uplink frame; transmitting the compensation indication information to the first terminal through a downlink frame; and performing, by the first terminal, the compensation based on the compensation indication message transmitted through the downlink frame.
    Type: Grant
    Filed: November 23, 2021
    Date of Patent: February 6, 2024
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Tae Joon Park, Eun Hee Kim, Jae Sun Cha, Jung Hoon Oh, Kye Seon Lee
  • Publication number: 20230321905
    Abstract: The disclosure relates to a 3D printer using a screw extruder, including a housing including a driving motor, a dispenser in which raw materials are stored and including a nozzle through which raw materials are sprayed, a screw extruder including a screw forming unit arranged inside the dispenser, having a rod shape, and including a spiral screw formed on an outer circumferential surface, and an extension portion extending from the screw forming unit to outside of the dispenser, and an accommodating portion provided in the housing and to which the dispenser is coupled, wherein the dispenser is detachably coupled to the accommodating portion of the housing.
    Type: Application
    Filed: August 11, 2021
    Publication date: October 12, 2023
    Inventor: Mi Sun CHA
  • Publication number: 20230285275
    Abstract: The present disclosure relates to: a biocompatible structure comprising a hollow cage, the biocompatible structure comprising, in a surface thereof, one or more open chambers that are recessed inward and hold a biologically active substance; and a method of manufacturing the same. A biocompatible structure according to one aspect comprises a mixed solution of a hydrogel and a biologically active substance in a chamber so that an osteogenesis-promoting substance is released continuously over a long period of time while having initial release stability, and thus osteogenesis at bone defect sites may be improved.
    Type: Application
    Filed: December 5, 2019
    Publication date: September 14, 2023
    Inventors: Mi Sun CHA, Jae Hyup LEE
  • Patent number: 11684694
    Abstract: Provided is a chitosan hydrogel composition including chitosan, glycerol, and a phosphate group, wherein the chitosan is crosslinked via the glycerol, the phosphate group, or a combination thereof. The temperature at which the chitosan hydrogel composition may be induced from a liquid state into a gel state may be controlled according to the content ratio of the phosphate group and the glycerol, and since printing properties and strength are affected by the gelatin concentration, the composition may be used as an ink for 3D printing.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: June 27, 2023
    Assignee: MEDIFAB CO., LTD.
    Inventors: Mi Sun Cha, Jung Ju Kim
  • Publication number: 20230199731
    Abstract: The present invention relates to a method and apparatus for radio communication of a time sensitive network. The method includes dividing, by the first node, a frame into a downlink section and an uplink section, transmitting, by the first node, downlink data to at least one second node in units of slots in the downlink section, and receiving, by the first node, uplink data from the at least one second node in units of slots in the uplink period.
    Type: Application
    Filed: December 20, 2022
    Publication date: June 22, 2023
    Inventors: Tae Joon PARK, Jae Sun CHA, Eun Hee KIM
  • Patent number: 11683417
    Abstract: Embodiments of the present disclosure include computer-implemented systems and methods for routing incoming customer requests or inquiries in a customer service center. The system may include at least one processor configured to execute instructions to perform steps. The steps may include receiving a plurality of incoming customer calls and a plurality of incoming customer chat sessions. The steps may include blending the received plurality of customer calls and the received plurality of customer chat sessions into a total queue for presentation to at least one user device. The steps may additionally include determining a respective priority for each of the blended plurality of customer calls and the blended plurality of customer chat sessions and sending, based on the determined priority, to the at least one user device at least one of the blended plurality of customer calls or the blended plurality of customer chat sessions.
    Type: Grant
    Filed: September 30, 2021
    Date of Patent: June 20, 2023
    Assignee: Coupang Corp.
    Inventors: Dae Sung Kang, Myung Sun Cha
  • Publication number: 20230171718
    Abstract: Disclosed herein is a method and apparatus for synchronizing timeslots in a wireless LAN system. The timeslot synchronization method includes: setting, by a first node, a timeslot synchronization reference based on a time synchronization function (TSF) value, followed by transmitting information about a reference of synchronization to a second node; and setting, by the second node, a timeslot synchronization reference based on a TSF value corresponding to the reference of synchronization based on the information transmitted from the first node.
    Type: Application
    Filed: November 23, 2022
    Publication date: June 1, 2023
    Inventors: Ja Beom GU, Tae Joon PARK, Jae Sun CHA
  • Publication number: 20220202989
    Abstract: Provided is a chitosan hydrogel composition including chitosan, glycerol, and a phosphate group, wherein the chitosan is crosslinked via the glycerol, the phosphate group, or a combination thereof. The temperature at which the chitosan hydrogel composition may be induced from a liquid state into a gel state may be controlled according to the content ratio of the phosphate group and the glycerol, and since printing properties and strength are affected by the gelatin concentration, the composition may be used as an ink for 3D printing.
    Type: Application
    Filed: April 24, 2020
    Publication date: June 30, 2022
    Inventors: Mi Sun CHA, Jung Ju KIM
  • Publication number: 20220191325
    Abstract: Embodiments of the present disclosure include computer-implemented systems and methods for routing incoming customer requests or inquiries in a customer service center. The system may include at least one processor configured to execute instructions to perform steps. The steps may include receiving a plurality of incoming customer calls and a plurality of incoming customer chat sessions. The steps may include blending the received plurality of customer calls and the received plurality of customer chat sessions into a total queue for presentation to at least one user device. The steps may additionally include determining a respective priority for each of the blended plurality of customer calls and the blended plurality of customer chat sessions and sending, based on the determined priority, to the at least one user device at least one of the blended plurality of customer calls or the blended plurality of customer chat sessions.
    Type: Application
    Filed: September 30, 2021
    Publication date: June 16, 2022
    Inventors: Dae Sung KANG, Myung Sun CHA
  • Publication number: 20220167287
    Abstract: An operation method of an access point (AP) and a terminal, in a wireless time sensitive network (WTSN), may comprise: receiving, by an AP, an uplink frame from a first terminal; generating compensation indication information for compensation to be performed in the first terminal according to channel information between the first terminal and the AP estimated based on the uplink frame; transmitting the compensation indication information to the first terminal through a downlink frame; and performing, by the first terminal, the compensation based on the compensation indication message transmitted through the downlink frame.
    Type: Application
    Filed: November 23, 2021
    Publication date: May 26, 2022
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Tae Joon PARK, Eun Hee KIM, Jae Sun CHA, Jung Hoon OH, Kye Seon LEE
  • Publication number: 20220150971
    Abstract: Provided is a method for transmitting, by a transmitter, a first data having periodicity through a channel of an unlicensed band: The transmitter adjusts at least one of transmission timing of the first data and clear channel assessment (CCA) timing for the channel to occupy the channel. The transmitter determines whether the channel may be occupied by performing a CCA on the channel at the CCA timing. The transmitter transmits the first data through the channel at the transmission timing of the first data, when it is determined that the channel may be occupied.
    Type: Application
    Filed: January 27, 2022
    Publication date: May 12, 2022
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Eunkyung KIM, Jae Sun CHA, Chanho YOON, Seung-Kwon BAEK, Jae Joon PARK, Kwang Jae LIM, Sung Cheol CHANG
  • Publication number: 20220145254
    Abstract: Provided is a method of preparing a hydrogel composition including a uniform content of calcium phosphate, wherein a hydrogel composition prepared by the method has a uniform content of calcium phosphate, and thus may be used to quantify phosphates contained in the hydrogel composition. Provided is an in-vitro 3D osteoporosis model including a calcium phosphate hydrogel composition, wherein osteoblasts and osteoclasts may be three-dimensionally co-cultured inside a biogel, such that the osteoporosis model may be fabricated according to an intended use or clinical stage. Further, the model contains a calcium phosphate hydrogel with a uniform content of phosphate and thus enables quantification of calcium phosphate through measurement of phosphates, and therefore, the model may be used to screen candidate compounds for an osteoporosis drug and may effectively predict therapeutic effects of the drug on osteoporosis.
    Type: Application
    Filed: July 23, 2020
    Publication date: May 12, 2022
    Inventors: Mi Sun CHA, Jung Ju KIM
  • Patent number: 11272541
    Abstract: Provided is a method for transmitting, by a transmitter, a first data having periodicity through a channel of an unlicensed band: The transmitter adjusts at least one of transmission timing of the first data and clear channel assessment (CCA) timing for the channel to occupy the channel. The transmitter determines whether the channel may be occupied by performing a CCA on the channel at the CCA timing. The transmitter transmits the first data through the channel at the transmission timing of the first data, when it is determined that the channel may be occupied.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: March 8, 2022
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Eunkyung Kim, Jae Sun Cha, Chanho Yoon, Seung-Kwon Baek, Jae Joon Park, Kwang Jae Lim, Sung Cheol Chang
  • Patent number: 11165907
    Abstract: Embodiments of the present disclosure include computer-implemented systems and methods for routing incoming customer requests or inquiries in a customer service center. The system may include at least one processor configured to execute instructions to perform steps. The steps may include receiving a plurality of incoming customer calls and a plurality of incoming customer chat sessions. The steps may include blending the received plurality of customer calls and the received plurality of customer chat sessions into a total queue for presentation to at least one user device. The steps may additionally include determining a respective priority for each of the blended plurality of customer calls and the blended plurality of customer chat sessions and sending, based on the determined priority, to the at least one user device at least one of the blended plurality of customer calls or the blended plurality of customer chat sessions.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: November 2, 2021
    Assignee: Coupang Corp.
    Inventors: Dae Sung Kang, Myung Sun Cha
  • Patent number: 10717697
    Abstract: The present invention relates to a method for preparing 1,3-cyclohexanedicarboxylic acid capable of exhibiting excellent activity, of enhancing the reaction efficiency and economic efficiency by using a catalyst having improved durability under the reaction conditions of high temperature and strong acid, of achieving excellent conversion rates by allowing most of reactants to participate in the reaction, and of obtaining products having high purity while minimizing by-products within a shorter period of time. The method for preparing 1,3-cyclohexanedicarboxylic acid may include: reducing isophthalic acid in the presence of a metal catalyst fixed to a silica support and containing a palladium (Pd) compound and a copper (Cu) compound in a weight ratio of 1:0.1 to 0.5.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: July 21, 2020
    Assignee: LOTTE CHEMICAL CORPORATION
    Inventors: Sung Min Kim, Mi Sun Cha, Seong Hwan Choi, Young Heon Choi, Sung Joon Park, Chan Yeong Yun, Young Jong Seo
  • Patent number: 10597344
    Abstract: The present invention relates to a method for preparing high-purity 1,3-cyclohexanedimethanol capable of achieving a high conversion rate by allowing most of the reactant to participate in the reaction, and of increasing reaction efficiency and economic efficiency by further simplifying the reaction process, while minimizing by-products within a shorter period of time. Specifically, the method for preparing 1,3-cyclohexanedimethanol includes reducing 1,3-cyclohexanedicarboxylic acid in the presence of a metal catalyst, which is fixed to a silica support and includes a ruthenium (Ru) compound, a tin (Sn) compound and a platinum (Pt) compound in a weight ratio of 1:0.8 to 1.2:1.2 to 2.4.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: March 24, 2020
    Assignee: Lotte Chemical Corporation
    Inventors: Mi Sun Cha, Seong Hwan Choi, Sung Min Kim, Sung Joon Park, Chan Yeong Yun, Young Heon Choi
  • Publication number: 20190394804
    Abstract: Provided is a method for transmitting, by a transmitter, a first data having periodicity through a channel of an unlicensed band: The transmitter adjusts at least one of transmission timing of the first data and clear channel assessment (CCA) timing for the channel to occupy the channel. The transmitter determines whether the channel may be occupied by performing a CCA on the channel at the CCA timing. The transmitter transmits the first data through the channel at the transmission timing of the first data, when it is determined that the channel may be occupied.
    Type: Application
    Filed: August 9, 2019
    Publication date: December 26, 2019
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Eunkyung KIM, Jae Sun CHA, Chanho YOON, Seung-Kwon BAEK, Jae Joon PARK, Kwang Jae LIM, Sung Cheol CHANG
  • Patent number: 10440744
    Abstract: Disclosed are a base station and a channel access method performing a channel access in a unlicensed band. The channel access method includes: performing channel sensing at least once on a channel of the unlicensed band in a channel sensing period of a frame; and broadcasting a reservation signal for the channel when the channel is empty.
    Type: Grant
    Filed: March 26, 2017
    Date of Patent: October 8, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jae Sun Cha, Eunkyung Kim, Jae Joon Park, Seung-Kwon Baek, Pyeong Jung Song, Chanho Yoon, Sung Cheol Chang