Patents by Inventor Choong Hwan Lee
Choong Hwan 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).
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Patent number: 12249536Abstract: A substrate supporting assembly includes a susceptor plate including at least one substrate seat, and a plurality of gas flow lines for supplying a lifting gas, an acceleration gas, and a deceleration gas to the substrate seat, and at least one satellite on the at least one substrate seat and including an upper surface, and a lower surface where a rotation pattern for receiving a rotational force and a braking force from the acceleration gas and the deceleration gas is provided. The at least one satellite is lifted from the at least one substrate seat by the lifting gas supplied from the at least one substrate seat, is rotated relative to the susceptor plate by the acceleration gas supplied in a forward direction of rotation, to rotate the substrate, and is decelerated or stopped by the deceleration gas supplied in a reverse direction of rotation.Type: GrantFiled: November 5, 2021Date of Patent: March 11, 2025Assignee: WONIK IPS CO., LTD.Inventors: Hyun Jong Lee, Chong Hwan Jong, Ho Jin Nam, Choong hyun Lee, Eo jin Kwon
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Publication number: 20240325469Abstract: The present invention relates to a novel Lactobacillus paracasei NK112 strain that has the effect of preventing or treating cognitive dysfunction and intestinal dysfunction. In addition, the present invention relates to a composition for prevention, treatment, or alleviation of cognitive dysfunction and intestinal dysfunction, comprising a Lactobacillus paracasei NK112 strain, a Cuscuta australis R.Br. extract, and a Cuscuta japonica Choisy extract. The strain and the composition, of the present invention, exhibit efficacy in increasing the expression of brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF), alleviating intestinal inflammation, and the like, and thus can be effectively used in the prevention or treatment of cognitive dysfunction and intestinal dysfunction.Type: ApplicationFiled: June 5, 2024Publication date: October 3, 2024Inventors: Miwon SOHN, Jin Gyu CHOI, Sinyeon KIM, Sang Cheol PARK, Dong Hyun KIM, Sun Yeou KIM, Seong Min HONG, Myung Sook OH, In Gyoung JU, Choong Hwan LEE
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Patent number: 10797802Abstract: An optical receiver includes a transimpedance amplifier that converts a current signal corresponding to an optical signal into a voltage signal. The transimpedance amplifier includes an input terminal receiving the current signal, an output terminal outputting the voltage signal, an inverting circuit including a pull-up device that pull-up drives the voltage signal of the output terminal according to the current signal, and a pull-down device that pull-down drives the voltage signal of the output terminal according to the current signal, a feedback resistor electrically connected between the input and output terminals, a first resistor electrically connected between the input terminal and the pull-up device, and a second resistor electrically connected between the input terminal and the pull-down device.Type: GrantFiled: March 22, 2019Date of Patent: October 6, 2020Assignees: SK hynix Inc., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATIONInventors: Chul Woo Kim, Hyun Su Park, Jin Cheol Sim, Choong Hwan Lee
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Patent number: 10700786Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.Type: GrantFiled: September 9, 2019Date of Patent: June 30, 2020Assignees: SK hynix Inc., Korea University Research and Business FoundationInventors: Chul Woo Kim, Sang Geun Bae, Hyun Su Park, Choong Hwan Lee
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Patent number: 10700785Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.Type: GrantFiled: September 9, 2019Date of Patent: June 30, 2020Assignees: SK hynix Inc., Korea University Research and Business FoundationInventors: Chul Woo Kim, Sang Geun Bae, Hyun Su Park, Choong Hwan Lee
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Patent number: 10581102Abstract: Disclosed is a ceria electrolyte for a solid oxide fuel cell, which is a ceria (CeO2) electrolyte configured such that either gadolinium (Gd) or samarium (Sm) is co-doped with ytterbium (Yb) and bismuth (Bi), wherein Bi is doped in an amount of 0.5 to 5 mol %, thus exhibiting low-temperature sintering properties.Type: GrantFiled: May 25, 2018Date of Patent: March 3, 2020Assignee: KCERACELL CO., LTD.Inventors: Kyoung Tae Lim, Hee Lak Lee, Hyeong Cheol Shin, Choong Hwan Lee, Byung Sub Kim, Jae Hwa Choi, Su Jeong Lee
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Publication number: 20200052796Abstract: An optical receiver includes a transimpedance amplifier that converts a current signal corresponding to an optical signal into a voltage signal. The transimpedance amplifier includes an input terminal receiving the current signal, an output terminal outputting the voltage signal, an inverting circuit including a pull-up device that pull-up drives the voltage signal of the output terminal according to the current signal, and a pull-down device that pull-down drives the voltage signal of the output terminal according to the current signal, a feedback resistor electrically connected between the input and output terminals, a first resistor electrically connected between the input terminal and the pull-up device, and a second resistor electrically connected between the input terminal and the pull-down device.Type: ApplicationFiled: March 22, 2019Publication date: February 13, 2020Inventors: Chul Woo KIM, Hyun Su PARK, Jin Cheol SIM, Choong Hwan LEE
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Publication number: 20200007239Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.Type: ApplicationFiled: September 9, 2019Publication date: January 2, 2020Inventors: Chul Woo KIM, Sang Geun BAE, Hyun Su PARK, Choong Hwan LEE
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Publication number: 20200007240Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.Type: ApplicationFiled: September 9, 2019Publication date: January 2, 2020Inventors: Chul Woo KIM, Sang Geun BAE, Hyun Su PARK, Choong Hwan LEE
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Patent number: 10447402Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.Type: GrantFiled: October 30, 2017Date of Patent: October 15, 2019Assignees: SK HYNIX INC., KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATIONInventors: Chul Woo Kim, Sang Geun Bae, Hyun Su Park, Choong Hwan Lee
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Publication number: 20180309148Abstract: Disclosed is a ceria electrolyte for a solid oxide fuel cell, which is a ceria (CeO2) electrolyte configured such that either gadolinium (Gd) or samarium (Sm) is co-doped with ytterbium (Yb) and bismuth (Bi), wherein Bi is doped in an amount of 0.5 to 5 mol %, thus exhibiting low-temperature sintering properties.Type: ApplicationFiled: May 25, 2018Publication date: October 25, 2018Applicant: KCERACELL CO., LTD.Inventors: Kyoung Tae Lim, Hee Lak Lee, Hyeong Cheol Shin, Choong Hwan Lee, Byung Sub Kim, Jae Hwa Choi, Su Jeong Lee
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Publication number: 20180294883Abstract: An optical transceiver includes an optical transmitter and an optical receiver. The optical transmitter includes a laser diode configured to convert a current signal into an optical signal; a main driver comprising first and second output terminals that have a differential structure, the main driver configured to drive the first and second output terminals in response to differential input signals and to provide the current signal to the laser diode through the first output terminal; and an impedance balancer configured to match impedances of the first and second output terminals by adjusting the impedance of the second output terminal according to signal states of the first and second output terminals.Type: ApplicationFiled: October 30, 2017Publication date: October 11, 2018Inventors: Chul Woo KIM, Sang Geun BAE, Hyun Su PARK, Choong Hwan LEE
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Patent number: 10008731Abstract: Disclosed is a ceria electrolyte for a solid oxide fuel cell, which is a ceria (CeO2) electrolyte configured such that either gadolinium (Gd) or samarium (Sm) is co-doped with ytterbium (Yb) and bismuth (Bi), wherein Bi is doped in an amount of 0.5 to 5 mol %, thus exhibiting low-temperature sintering properties.Type: GrantFiled: March 10, 2016Date of Patent: June 26, 2018Assignee: KCERACELL CO., LTD.Inventors: Kyoung Tae Lim, Hee Lak Lee, Hyeong Cheol Shin, Choong Hwan Lee, Byung Sub Kim, Jae Hwa Choi, Su Jeong Lee
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Patent number: 9847545Abstract: Disclosed are a highly ionic conductive zirconia electrolyte and a high-efficiency solid oxide fuel cell using the same. The highly ionic conductive zirconia electrolyte is configured such that a scandia (Sc2O3) stabilized zirconia (ZrO2) electrolyte is simultaneously doped with cerium oxide (CeO2) and at least one oxide of gadolinium oxide (Gd2O3), samarium oxide (Sm2O3), and ytterbium oxide (Yb2O3) so that an ionic conductivity drop rate is mitigated.Type: GrantFiled: March 4, 2015Date of Patent: December 19, 2017Assignee: KCERACELL CO., LTD.Inventors: Kyoung Tae Lim, Hee Lak Lee, Hyeong Cheol Shin, Choong Hwan Lee, Byung Sub Kim
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Publication number: 20170062855Abstract: Disclosed is a ceria electrolyte for a solid oxide fuel cell, which is a ceria (CeO2) electrolyte configured such that either gadolinium (Gd) or samarium (Sm) is co-doped with ytterbium (Yb) and bismuth (Bi), wherein Bi is doped in an amount of 0.5 to 5 mol %, thus exhibiting low-temperature sintering properties.Type: ApplicationFiled: March 10, 2016Publication date: March 2, 2017Applicant: KCERACELL CO., LTD.Inventors: Kyoung Tae LIM, Hee Lak Lee, Hyeong Cheol Shin, Choong Hwan Lee, Byung Sub Kim, Jae Hwa Choi, Su Jeong Lee
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Publication number: 20160175221Abstract: The present invention relates to a composition for preventing skin aging containing aloesin or a derivative thereof. The aloesin or the derivative thereof, according to the present invention reduces cytotoxicity and inhibits a MMP-1 level and increases PIP levels and procollagen type 1, in normal human dermal fibroblasts (NHDF) after ultraviolet irradiation, and thus is particularly effective for preventing or treating skin photoaging induced by ultraviolet irradiation.Type: ApplicationFiled: July 11, 2014Publication date: June 23, 2016Inventors: Seon-Gil DO, Jin-Wan KIM, Yoo-Jeong JIN, Sun-Yeou KIM, Ji-Hye MOON, Choong-Hwan LEE, Sa-Rah LEE
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Publication number: 20150255821Abstract: Disclosed are a highly ionic conductive zirconia electrolyte and a high-efficiency solid oxide fuel cell using the same. The highly ionic conductive zirconia electrolyte is configured such that a scandia (Sc2O3) stabilized zirconia (ZrO2) electrolyte is simultaneously doped with cerium oxide (CeO2) and at least one oxide of gadolinium oxide (Gd2O3), samarium oxide (Sm2O3), and ytterbium oxide (Sm2O3) so that an ionic conductivity drop rate is mitigated.Type: ApplicationFiled: March 4, 2015Publication date: September 10, 2015Applicant: KCERACELL CO., LTD.Inventors: Kyoung Tae LIM, Hee Lak LEE, Hyeong Cheol SHIN, Choong Hwan LEE, Byung Sub KIM
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Patent number: 8379065Abstract: The present invention discloses a method for displaying a high resolution picture in a mobile communication terminal having a low resolution display means, the mobile communication terminal and a system for converting a picture file format therefor.Type: GrantFiled: September 30, 2003Date of Patent: February 19, 2013Assignees: SK Planet Co., Ltd., Digital Aria Co., Ltd.Inventors: Gi-Seon Nam, Choong-Hwan Lee, Hwang-Seok Oh, Kyeong-Ryeol Park, Jea-Woo Ahn
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Patent number: 7998937Abstract: The present invention relates to a flavonoid compound having an antiviral activity, more particularly to a flavonoid compound obtained by extracting Houttuynia cordata with methanol and separating/purifying with chromatography, a method for efficient extraction and purification of the same and an antiviral composition comprising the compound as an active ingredient.Type: GrantFiled: November 3, 2006Date of Patent: August 16, 2011Assignee: Korea Research Institute of Bioscience and BiotechnologyInventors: Dur Han Kwon, Wha Jeong Choi, Choong Hwan Lee, Jin Hee Kim, Man Bae Kim
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Publication number: 20090171074Abstract: The present invention relates to a flavonoid compound having an antiviral activity, more particularly to a flavonoid compound obtained by extracting Houttuynia cordata with methanol and separating/purifying with chromatography, a method for efficient extraction and purification of the same and an antiviral composition comprising the compound as an active ingredient.Type: ApplicationFiled: November 3, 2006Publication date: July 2, 2009Inventors: Dur Han Kwon, Wha Jeong Choi, Choong Hwan Lee, Jin Hee Kim, Man Bae Kim