Patents by Inventor Chang-hwan Kim

Chang-hwan Kim 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: 20250186651
    Abstract: The present invention relates to a hydrogel-based wound dressing containing a protein extract. The wound dressing comprises a polyethylene glycol, white Vaseline, 1,2-hexanediol, ethylhexylglycerin, a sodium hyaluronate, a protein extract, and purified water; maintains the same viscosity at temperatures similar to body temperature as at room temperature, thus being convenient to use; and is excellent in terms of wound healing rate, re-epithelialization rate, and blood vessel formation.
    Type: Application
    Filed: February 24, 2025
    Publication date: June 12, 2025
    Applicant: T&R BIOFAB CO., LTD.
    Inventors: Hyun Jung KIM, Chang Hwan KIM, Young Hwan KIM, Hyuk Joo AHN, Jae Hang SHIN
  • Publication number: 20250187403
    Abstract: A vehicle heating, ventilation, and air conditioning (HVAC) system is provided. The system includes a compressor having: a compression section; a motor section configured to drive the compression section; and an inverter configured to allow the motor section to operate in any one of an efficiency mode and a lossy mode. The system also includes a controller configured to control the inverter of the compressor based on a minimum temperature of a refrigerant and a freezing temperature of refrigerant oil contained in the refrigerant.
    Type: Application
    Filed: July 25, 2024
    Publication date: June 12, 2025
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION
    Inventors: Tae Woong Lim, Ji Wan Son, Kyu Ho Chae, Chan Woong Jo, Jae Won Heo, Chang Hwan Kim
  • Publication number: 20250096758
    Abstract: This embodiment provides an interpolation amplifier including an input stage, a load stage, and an output stage, the input stage includes a plurality of connection source modules to which an input signal with a plurality of bits is provided, the connection source modules each include a first differential pair and a second differential pair to which an input voltage is input and an output voltage of the interpolation amplifier is fed back and input, a first current source connected to the first differential pair to provide a bias current, and a second current source connected to the second differential pair to provide a bias current, sources of the first differential pairs included in two or more of the connection source modules are connected to each other, and sources of the second differential pairs included in the two or more of the connection source modules are connected to each other.
    Type: Application
    Filed: September 13, 2024
    Publication date: March 20, 2025
    Applicant: Anapass Inc.
    Inventor: Chang Hwan KIM
  • Publication number: 20250062706
    Abstract: A forced discharge apparatus for a high-voltage component may include a component unit connected to a power supply unit through a connector. The forced discharge apparatus may also include a forced discharge circuit connected between the power supply unit and the component unit. The forced discharge apparatus may also include a control unit configured to discharge the component unit through the forced discharge circuit such that a voltage of the component unit becomes below a target voltage in response to a detection that a back electromotive force generated from the component unit when the connector is separated.
    Type: Application
    Filed: December 13, 2023
    Publication date: February 20, 2025
    Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATION
    Inventors: Do Yeon Ku, Taewoong Lim, ChanWoong Jo, Ji Wan Son, Chang Hwan Kim
  • Publication number: 20250041482
    Abstract: The present invention relates to a multi-stage decellularized mammal-derived tissue supplement, prepared by a method comprising: a preparation step for preparing tissue of a non-human mammal; a pretreatment step for pretreating the tissue; a first inactivation step for inactivating a virus included in the pretreated tissue using alcohol; a primary decellularization step for removing cells from the virus-inactivated tissue using an aqueous basic solution; a secondary decellularization step for removing cells by enzymatically treating the primary decellularized tissue; and a second inactivation step for inactivating a virus included in the decellularized tissue using an acid, and wherein the DNA content in the tissue subjected to the pretreatment step to the second inactivation step is 50 ng/mg or less, and the degradation time using 100 U/ml of collagenase is at least 90 hours; and a method for preparing the same.
    Type: Application
    Filed: October 18, 2024
    Publication date: February 6, 2025
    Applicant: T&R BIOFAB CO., LTD.
    Inventors: Hyun Jung KIM, Chang Hwan KIM, Eun Hye PARK, Young Hwan KIM, Jae Hang SHIN, In Hank CHOI
  • Publication number: 20250041481
    Abstract: The present invention relates to a multi-stage decellularized mammal-derived tissue matrix, prepared by a method comprising: a preparation step for preparing tissue of a non-human mammal; a pretreatment step for pretreating the tissue; a first inactivation step for inactivating a virus included in the pretreated tissue using alcohol; a primary decellularization step for removing cells from the virus-inactivated tissue using an aqueous basic solution; a secondary decellularization step for removing cells by enzymatically treating the primary decellularized tissue; and a second inactivation step for inactivating a virus included in the decellularized tissue using an acid, and wherein the DNA content in the tissue subjected to the second inactivation step is 50 ng/mg or less, and the reduction rate (L) of the elastin content in the tissue subjected to the pretreatment step to the second inactivation step is 20% or less; and a method for preparing the same.
    Type: Application
    Filed: October 21, 2024
    Publication date: February 6, 2025
    Applicant: T&R BIOFAB CO., LTD.
    Inventors: Hyun Jung KIM, Chang Hwan KIM, Eun Hye PARK, Young Hwan KIM, Jae Hang SHIN, In Hank CHOI
  • Patent number: 12179560
    Abstract: A compressor control apparatus and method includes: a sensor configured to detect air conditioner operation state information necessary to control engagement and disengagement of a clutch of an air conditioner compressor; an electromagnetic coil in the clutch of the air conditioner compressor configured to perform clutch engagement upon receiving battery current; a microcomputer configured to determine whether the current air conditioner operation state satisfies a clutch engagement allowance condition or a clutch disengagement condition based on the air conditioner operation state information detected by the sensor and to output an operation signal based on the result of determination; and a switch configured to be turned on or off according to the operation signal output by the microcomputer and to control supply of the battery current to the electromagnetic coil such that clutch engagement or clutch disengagement is performed.
    Type: Grant
    Filed: November 9, 2021
    Date of Patent: December 31, 2024
    Assignees: HYUNDAI MOTOR COMPANY, KIA CORPORATION
    Inventors: Ji Wan Son, Chang Hwan Kim, Sang Hun Lee, Tae Woong Lim, Jin Sung Kim
  • Publication number: 20240325281
    Abstract: Provided are a multilayer cleaning agent composition including a perfluorinated oil, a hydrophilic functional group-bonded fluorine-based additive, and a polyol, and a method of cleaning a fluorine-based reactive skin protectant using the same. The composition may rapidly and safely clean a reactive skin protectant including the fluorine-based component which is applied to skin for preventing a chemical agent from penetrating into the skin and decomposition products thereof, thereby cleanly removing residues.
    Type: Application
    Filed: March 22, 2024
    Publication date: October 3, 2024
    Inventors: Hae Eun JOE, Chang Hwan KIM, Dong Sung SEO, Sang Woong KIM, Young CHO
  • Patent number: 12032832
    Abstract: A storage device and an operating method thereof are provided. Provided is a storage device including, a memory cell, and a storage controller which includes a flash controller that performs a data operation on the memory cell, and a processor that executes an RTOS (Real Time Operating System) for controlling the flash controller, wherein the RTOS communicates with the storage controller and operates in a normal operation mode, the RTOS generates a snapshot data in a debug mode when a defect occurs, the RTOS switches to the debug mode through context switching in the normal operation mode, and the RTOS operates in the normal operation mode, when an urgent work occurs, while performing an operation of generating the snapshot data in the debug mode.
    Type: Grant
    Filed: July 18, 2022
    Date of Patent: July 9, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung Jin Moon, Chang Hwan Kim, Young-Sik Lee, Eun Ju Choi
  • Publication number: 20240172939
    Abstract: A portable complex sensor device for measuring multiple items of biometric information, according to the present invention, comprises: a plurality of electrodes for receiving the biometric information; a plurality of biometric information measuring circuits for measuring the biometric information received from the plurality of electrodes; a plurality of current sensors which are always supplied with power so as to sense electric current when an object to be measured contacts the electrodes; a wireless communication means for transmitting and receiving data to and from a smart phone; and a microcontroller for controlling the power supply of a battery by being operated in a sleep mode or an active mode on the basis of whether the current sensors have sensed the electric current.
    Type: Application
    Filed: February 5, 2024
    Publication date: May 30, 2024
    Applicant: HEXACHECK INC.
    Inventors: In Deok HWANG, Chang Hwan KIM
  • Publication number: 20240130952
    Abstract: Provided are the reactive topical skin protectant formulations including: water or moisture; plate-like inorganic particle powder; and one or more selected from the group consisting of a) liquid perfluoride, b) polyol, c) perfluorinated polymer powder, d) polysaccharides, e) liquid silicon-based material, and f) additives, and the reactive topical skin protectant formulations may provide an effect of safely protecting the skin from various lesions and risks occurring by liquid chemical agents or harmful toxic substances penetrating the human skin.
    Type: Application
    Filed: March 28, 2023
    Publication date: April 25, 2024
    Inventors: Hae Eun JOE, Chang Hwan KIM, Dong Sung SEO, Sang Woong KIM, Young CHO
  • Publication number: 20240072553
    Abstract: An electronic device includes a connector including a pair of terminals connected to a power source, a voltage sensor provided to detect a voltage between the pair of terminals, a communication device provided to perform communication with an external control device through a network, and a controller configured to determine whether the connector is separated from the power source based on a voltage variation between the pair of terminals, control the communication device to request the external control device to cut off power of the power source when the connector is separated from the power source, and control to perform self-discharge.
    Type: Application
    Filed: May 3, 2023
    Publication date: February 29, 2024
    Inventors: Ji Wan Son, Taewoong Lim, Chan Woong Jo, Dong Seok Oh, Chang Hwan Kim
  • Patent number: 11890075
    Abstract: A portable complex sensor device for measuring multiple items of biometric information, according to the present invention, comprises: a plurality of electrodes for receiving the biometric information; a plurality of biometric information measuring circuits for measuring the biometric information received from the plurality of electrodes; a plurality of current sensors which are always supplied with power so as to sense electric current when an object to be measured contacts the electrodes; a wireless communication means for transmitting and receiving data to and from a smart phone; and a microcontroller for controlling the power supply of a battery by being operated in a sleep mode or an active mode on the basis of whether the current sensors have sensed the electric current.
    Type: Grant
    Filed: November 13, 2020
    Date of Patent: February 6, 2024
    Assignee: HEXACHECK INC.
    Inventors: In Deok Hwang, Chang Hwan Kim
  • Patent number: 11826737
    Abstract: Disclosed is a method of preparing a high-performance zeolite catalyst for reducing nitrogen oxide emissions, and more particularly a technique for preparing a zeolite catalyst, suitable for use in effectively removing nitrogen oxide (NOx), among exhaust gases emitted from vehicle internal combustion engines through selective catalytic reduction (SCR), thereby exhibiting high efficiency, high chemical stability and high thermal durability upon SCR using the prepared catalyst.
    Type: Grant
    Filed: December 22, 2021
    Date of Patent: November 28, 2023
    Assignees: Hyundai Motor Company, Kia Corporation, Heesung Catalysts Corporation
    Inventors: Pyung Soon Kim, Young Jin Kim, Chang Hwan Kim, Seung Chul Na, Seung Ho Oh, Young San Yoo, Ho Dong Kim
  • Publication number: 20230347736
    Abstract: A torque control apparatus may include an input device, a driving device, a memory, and a controller. For example, the torque control apparatus may be configured to obtain an input related to acceleration of the host vehicle from a user by use of the input device, to determine user requirement torque based on the input, to generate a first requirement torque to be input to the driving device for the acceleration of the host vehicle based on at least part of the user requirement torque, to generate an estimation rate value through the first requirement torque by use of a pitch rate estimation model, and to generate a second requirement torque by use of at least one of the estimation rate value, a requirement rate value, the user requirement torque, or a combination of the estimation rate value, the requirement rate value, and the user requirement torque.
    Type: Application
    Filed: July 6, 2023
    Publication date: November 2, 2023
    Applicants: Hyundai Motor Company, Kia Corporation
    Inventors: Young Sun NAM, Chang Hee CHO, Chang Hwan KIM, In Kyu LEE, Jae Ho LEE, Doo Hyun KIM, Sung Hoon YU, Lee Hyoung CHO, Nam Kwon LEE, Young Eun KIM, Jong Wha KIM, Ye Chan JEONG, Beom Jun PARK, Hyun KIM, Sang Joon KIM
  • Publication number: 20230265172
    Abstract: The present invention relates to a humanized antibody specific to a Bacillus anthracis protective antigen and a preparation method thereof. An antibody library is created by obtaining a Bacillus anthracis protective antigen antibody of a monkey from immune cells obtained by immunizing a Bacillus anthracis protective antigen, an antibody specific to the Bacillus anthracis protective antigen is selected from the created antibody library, and, on the basis of the antibody, a humanized antibody specific to the Bacillus anthracis protective antigen is finally selected by creating a humanized antibody library against a Bacillus anthracis protective antigen.
    Type: Application
    Filed: July 26, 2021
    Publication date: August 24, 2023
    Inventors: Chi-Ho Yu, Chang-Hwan Kim, Gyeung-Haeng Hur, Seong-Tae Jeong, Dong-Hyun Song, Hae-Eun Joe, Na-Young Kim, Jun-Young Choi, Young-Kee Shin, Hyun-Ho Jeong, Seung-Chul Jun
  • Publication number: 20230234586
    Abstract: A vehicle speed controlling apparatus comprising a driving mode selector configured to receive a selection of a periodic-speed driving mode from a user, a driving strategy control unit including a speed profile generator configured to generate a periodic-speed driving speed profile with a period, an amplitude, and an average speed, and a driving assistance unit configured to output a required torque for a driving motor to follow the periodic-speed driving speed profile.
    Type: Application
    Filed: September 19, 2022
    Publication date: July 27, 2023
    Inventors: Ye Chan Jeong, Sang Joon Kim, Chang Hwan Kim, In Kyu Lee, Young Sun Nam, Doo Hyun Kim, Sung Hoon Yu, Lee Hyoung Cho, Chang Jin Oh, Nam Kwon Lee, Young Eun Kim, Jong Wha Kim, Hyun Kim, Oh Eun Kwon
  • Publication number: 20230191362
    Abstract: The present invention relates to a hydrocarbon adsorbent with metal-impregnated zeolite particles having regular mesopores and a manufacturing method therefor. The hydrocarbon adsorbent includes a metal cation and a metal oxide that are impregnated in zeolite particles, in particular, the zeolite particles include regularly formed mesopores having a size of 2 to 10. By adjusting a Si/Al ratio and mesoporosity of the mesopores, a hydrocarbon adsorbent may have increased adsorption capacity for hydrocarbons in a cold-start section and can rapidly oxidize the hydrocarbon upon desorption thereof, thereby reducing the discharge of exhaust gas produced in automobiles and industries.
    Type: Application
    Filed: February 3, 2023
    Publication date: June 22, 2023
    Inventors: Jungkyu Choi, Kwan Young Lee, Eun-Hee Jang, Chang Hwan Kim, Chun Yong Kang
  • Publication number: 20230195321
    Abstract: A storage device and an operating method thereof are provided. Provided is a storage device including, a memory cell, and a storage controller which includes a flash controller that performs a data operation on the memory cell, and a processor that executes an RTOS (Real Time Operating System) for controlling the flash controller, wherein the RTOS communicates with the storage controller and operates in a normal operation mode, the RTOS generates a snapshot data in a debug mode when a defect occurs, the RTOS switches to the debug mode through context switching in the normal operation mode, and the RTOS operates in the normal operation mode, when an urgent work occurs, while performing an operation of generating the snapshot data in the debug mode.
    Type: Application
    Filed: July 18, 2022
    Publication date: June 22, 2023
    Inventors: Sung Jin MOON, Chang Hwan KIM, Young-Sik LEE, Eun Ju CHOI
  • Publication number: 20230173455
    Abstract: A hydrocarbon adsorbent according to one exemplary embodiment of the present invention includes a beta zeolite containing copper, in which a Si/Al molar ratio of the beta zeolite is 12.5 to 150, and the amount of the copper contained is 1 wt % to 10 wt %.
    Type: Application
    Filed: January 27, 2023
    Publication date: June 8, 2023
    Applicant: Korea University Research and Business Foundation
    Inventors: Chun Yong KANG, Chang Hwan KIM, Jungkyu CHOI, Eunhee JANG, Jin Seong KIM, La Young CHOI