Patents by Inventor Su-Yong Choi
Su-Yong 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).
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Publication number: 20240128658Abstract: A dual polarization antenna is disclosed in at least one embodiment of the present disclosure, including a base substrate, a power feeding unit supported on the base substrate, and a radiating plate supported on the power feeding unit, wherein the first feeding substrate includes a first insulating substrate supported on the base substrate, and a first feed line attached to the first insulating substrate and configured to supply a first reference phase signal to a first point on the radiating plate and to supply to a second point on the radiating plate, a first reverse phase signal having a reverse phase relative to the first reference phase signal, and wherein the second feeding substrate includes a second insulating substrate supported on the base substrate, and a second feed line attached to the first insulating substrate and configured to supply a second reference phase signal to a third point on the radiating plate and to supply to a fourth point on the radiating plate, a second reverse phase signal haviType: ApplicationFiled: December 15, 2023Publication date: April 18, 2024Applicant: KMW INC.Inventors: Seong Man KANG, Oh Seog CHOI, Hun Jung JUNG, Gyo Jin JO, Su Yong LEE
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Patent number: 11936417Abstract: The present invention relates to a time-division duplex (TDD) antenna apparatus which can reduce signal loss, and thereby minimize the noise figure (NF) of a system and extend uplink coverage of the system, by separating a transmitter circuit from a receiver circuit of the antenna apparatus, and disposing a low noise amplifier (LNA) of the receiver circuit between a reception antenna and a reception filter of the receiver. A time-division duplex antenna apparatus according to an embodiment of the present invention includes: a transmitter which includes at least one transmission antenna module and transmits a downlink signal through a first path; a receiver which includes at least one reception antenna module and receives an uplink signal through a second path that is separated from the first path without any overlapping portions thereof; and a controller which controls the transmitter and the receiver in a time-division duplex manner.Type: GrantFiled: December 2, 2021Date of Patent: March 19, 2024Assignee: KMW INC.Inventors: Duk Yong Kim, Min Seon Yun, Bae Mook Jeong, Chang Seob Choi, Su Won Lee
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Patent number: 11787448Abstract: Provided is a hypertube transport system. Specifically, provided are a magnetically-levitated train and an infrastructure-system in which same travels, comprising: refrigerant for cooling compressed air of a hypertube train, and a compressed air cooling system utilizing the refrigerant; an apparatus and method for controlling trains operating in a vacuum tube; superconducting switches for superconducting magnets for magnetic levitation; a driving stability apparatus for the hypertube transport system; a control apparatus for trains of the hypertube transport system; and an energy harvester.Type: GrantFiled: August 28, 2018Date of Patent: October 17, 2023Assignee: KRRIInventors: Kwan Sup Lee, Young Jun Jang, Jae Hoon Kim, Chang Young Lee, Lee Hyeon Kim, Min Hwan Ok, Jeong Min Jo, Jin Ho Lee, Jung Youl Lim, Jae Heon Choe, Su Yong Choi
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Patent number: 11320070Abstract: A tube infrastructure includes a first tube; a second tube that is coupled to the first tube; and a fluid tank that is disposed to surround a coupling region of the first tube and the second tube and is filled with a fluid to seal the coupling region, wherein the fluid tank allows negative pressure to be maintained inside the first tube and the second tube.Type: GrantFiled: July 19, 2018Date of Patent: May 3, 2022Assignee: KOREA RAILROAD RESEARCH INSTITUTEInventors: Jae Heon Choe, Kwan Sup Lee, Su Yong Choi, Chang Young Lee, Jung Youl Lim, Jin Ho Lee, Yong Jun Jang, Jeong Min Jo, Min Hwan Ok, Jae Hoon Kim
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Publication number: 20200362995Abstract: A tube infrastructure includes a first tube; a second tube that is coupled to the first tube; and a fluid tank that is disposed to surround a coupling region of the first tube and the second tube and is filled with a fluid to seal the coupling region, wherein the fluid tank allows negative pressure to be maintained inside the first tube and the second tube.Type: ApplicationFiled: July 19, 2018Publication date: November 19, 2020Inventors: Jae Heon CHOE, Kwan Sup LEE, Su Yong CHOI, Chang Young LEE, Jung Youl LIM, Jin Ho LEE, Yong Jun JANG, Jeong Min JO, Min Hwan OK, Jae Hoon KIM
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Publication number: 20200284348Abstract: The present disclosure provides a sealing apparatus for use in a hypertube, which includes a first tube, a second tube having one end connected to an end of the first tube, and a gasket including a seal made of a fiber structure formed with a space that is filled with a sealing fluid, wherein the gasket is configured to seal a space between the first tube and the second tube.Type: ApplicationFiled: December 5, 2018Publication date: September 10, 2020Applicant: Korean Railroad Research InstituteInventors: JaeHeon CHOI, KwanSup LEE, Su Yong CHOI, JinHo LEE, YongJun JANG, Chang Young LEE, LeeHyeon KIM, MinHwan OK, JungYoul LIM, JeongMin JO
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Publication number: 20200239036Abstract: Provided is a hypertube transport system. Specifically, provided are a magnetically-levitated train and an infrastructure-system in which same travels, comprising: refrigerant for cooling compressed air of a hypertube train, and a compressed air cooling system utilizing the refrigerant; an apparatus and method for controlling trains operating in a vacuum tube; superconducting switches for superconducting magnets for magnetic levitation; a driving stability apparatus for the hypertube transport system; a control apparatus for trains of the hypertube transport system; and an energy harvester.Type: ApplicationFiled: August 28, 2018Publication date: July 30, 2020Inventors: Kwan Sup LEE, Young Jun JANG, Jae Hoon KIM, Chang Young LEE, Lee Hyeon KIM, Min Hwan OK, Jeong Min JO, Jin Ho LEE, Jung Youl LIM, Jae Heon CHOE, Su Yong CHOI
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Patent number: 8299049Abstract: The present invention relates to an anoikis-inducing agent comprising a Tiarella polyphylla extract, a tiarellic acid compound isolated therefrom or a pharmaceutically acceptable salt thereof, which is specific to cancer cells expressing a tumor-associated antigen L6 or a homolog thereof. The Tiarella polyphylla extract, the tiarellic acid compound isolated therefrom or pharmaceutically acceptable salt thereof of the present invention leads to loss of cell adhesion to reduce cancer cell proliferation and exhibits the effect of inducing cell death in cancer cells expressing a tumor-associated antigen L6 or a homolog thereof, thereby being used for preventing and treating cancer diseases due to a tumor-associated antigen L6 or a homolog thereof.Type: GrantFiled: November 25, 2009Date of Patent: October 30, 2012Assignee: Korea Institute of Bioscience and BiotechnologyInventors: Hyeong-Kyu Lee, Sei-Ryang Oh, Kyungseop Ahn, Joongku Lee, Sangku Lee, Ho-Jae Lee, Doo-Young Kim, Jung-Hee Kim, Eun-Ah Kim, Soon-Ja Choi, Soo Hyun Kim, Jung Weon Lee, Su-Yong Choi
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Publication number: 20100081638Abstract: The present invention relates to an anoikis-inducing agent comprising a Tiarella polyphylla extract, a tiarellic acid compound isolated therefrom or a pharmaceutically acceptable salt thereof, which is specific to cancer cells expressing a tumor-associated antigen L6 or a homolog thereof. The Tiarella polyphylla extract, the tiarellic acid compound isolated therefrom or pharmaceutically acceptable salt thereof of the present invention leads to loss of cell adhesion to reduce cancer cell proliferation and exhibits the effect of inducing cell death in cancer cells expressing a tumor-associated antigen L6 or a homolog thereof, thereby being used for preventing and treating cancer diseases due to a tumor-associated antigen L6 or a homolog thereof.Type: ApplicationFiled: November 25, 2009Publication date: April 1, 2010Applicant: KOREA RESEARCH INSTITUTE OF BIOSCIENCE AND BIOTECHNOLOGYInventors: Hyeong-Kyu Lee, Sei-Ryang Oh, Kyungseop Ahn, Joongku Lee, Sangku Lee, Ho-Jae Lee, Doo-Young Kim, Jung-Hee Kim, Eun-Ah Kim, Soon-Ja Choi, Soo Hyun Kim, Jung Weon Lee, Su-Yong Choi