Patents by Inventor Seung Kwon Oh
Seung Kwon Oh 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: 11949881Abstract: The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.Type: GrantFiled: April 1, 2021Date of Patent: April 2, 2024Assignees: Electronics and Telecommunications Research Institute, Kwangwoon University Research Institute for Industry Cooperation, Industry-Academia Cooperation Group of Sejong UniversityInventors: Se-Yoon Jeong, Hae-Chul Choi, Jeong-Il Seo, Seung-Kwon Beack, In-Seon Jang, Jae-Gon Kim, Kyung-Ae Moon, Dae-Young Jang, Jin-Woo Hong, Jin-Woong Kim, Yung-Lyul Lee, Dong-Gyu Sim, Seoung-Jun Oh, Chang-Beom Ahn, Dae-Yeon Kim, Dong-Kyun Kim
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Patent number: 11130093Abstract: An oxygen supplying apparatus includes: an oxygen enriching module including a plurality of oxygen enriching units; a pressure boosting module which receives the oxygen-enriched gas from the oxygen enriching module and boosts pressure of the oxygen-enriched gas; and a controller controlling operations of the oxygen enriching module and the pressure boosting module. The pressure boosting module includes: a low-pressure tank which receives and stores the oxygen-enriched gas from the oxygen enriching module; a pressure booster which boosts pressure of the oxygen-enriched gas discharged from the low-pressure tank; a high-pressure tank stores the oxygen-enriched gas pressure-boosted by the pressure booster; and at least one bypass valve which is provided to a bypass passage for bypassing a portion of the pressure-boosted oxygen-enriched gas stored in the high-pressure tank to the low-pressure tank to regulate bypassing of the oxygen-enriched gas from the high-pressure tank to the low-pressure tank.Type: GrantFiled: July 26, 2019Date of Patent: September 28, 2021Assignee: OXUS CO., LTD.Inventors: Hyeon Seong Kim, Seung Kwon Oh, Jee Soo Kwak, Kang Han Lee, Myeong Gu Kim
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Patent number: 10980964Abstract: A nasal cannula according to an embodiment of the present invention includes: an oxygen supplying portion which forms a space inside in which a nose and a mouth of a user can be disposed and is able to supply oxygen in a state of being put on by the user into the nose of the user; and a mask portion to which the oxygen supplying portion is attached in a detachable manner therein and is configured to be put on a face of the user. Since a space in which a nose and a mouth of a user can be disposed is provided inside the oxygen supplying portion so that a user can put on the nasal cannula in a convenient state and the oxygen supplying portion is put on in a state of being supported by the mask portion, oxygen can be supplied into the nose of the user and at the same time external air can be filtered.Type: GrantFiled: August 4, 2016Date of Patent: April 20, 2021Assignee: Sogang University Research FoundationInventors: Tae-Soo Lee, Seung Kwon Oh, Seung Hyun Ryu, Bong Kwan Son, Sung Hun Ha, Dong Min Shin, Yong Sang Shin
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Publication number: 20210001265Abstract: An oxygen supplying apparatus includes: an oxygen enriching module including a plurality of oxygen enriching units; a pressure boosting module which receives the oxygen-enriched gas from the oxygen enriching module and boosts pressure of the oxygen-enriched gas; and a controller controlling operations of the oxygen enriching module and the pressure boosting module. The pressure boosting module includes: a low-pressure tank which receives and stores the oxygen-enriched gas from the oxygen enriching module; a pressure booster which boosts pressure of the oxygen-enriched gas discharged from the low-pressure tank; a high-pressure tank stores the oxygen-enriched gas pressure-boosted by the pressure booster; and at least one bypass valve which is provided to a bypass passage for bypassing a portion of the pressure-boosted oxygen-enriched gas stored in the high-pressure tank to the low-pressure tank to regulate bypassing of the oxygen-enriched gas from the high-pressure tank to the low-pressure tank.Type: ApplicationFiled: July 26, 2019Publication date: January 7, 2021Applicant: OXUS CO., LTD.Inventors: Hyeon Seong KIM, Seung Kwon OH, Jee Soo KWAK, Kang Han LEE, Myeong Gu KIM
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Patent number: 10751500Abstract: An oxygen delivery method for delivering oxygen stored in an oxygen tank to a recipient according to an embodiment of the present invention includes: receiving a prescription flow that is an oxygen delivery flow prescribed to the recipient; receiving a saving ratio, the saving ratio being input by the recipient and being a ratio of a prescription flow and an average delivery flow; selecting an oxygen delivery mode among a plurality of preset oxygen delivery modes based on the saving ratio; detecting a breathing pressure of the recipient; and controlling an oxygen delivery flow to the recipient based on the prescription flow, the saving ratio and detected breathing pressure.Type: GrantFiled: February 9, 2018Date of Patent: August 25, 2020Assignee: OXUS CO., LTD.Inventors: Tae-Soo Lee, Yoon-Sun Choi, Seung-Kwon Oh, Gil-Jun Lee
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Patent number: 10416125Abstract: A method for determining concentration and pressure of respective gas consisting of multi-gas using emitting and receiving of ultrasound includes: measuring a reference ultrasound flight time; measuring ultrasound flight times at plural concentrations, temperatures and pressures; obtaining an ultrasound flight time table comprising ultrasound flight time change values which are differences between the reference ultrasound flight time, which varies according to parameters of concentration, temperature and pressure, and the measured ultrasound flight time; obtaining an ultrasound amplitude table comprising ultrasound amplitude values of a waveform of a predetermined sequence of the received ultrasound waveform at plural concentrations, temperatures and pressures in a state that concentration, temperature and pressure of the target respective gas are parameters; and calculating the concentration and the pressure of the target gas based on performing temperature compensations for the ultrasound flight time changeType: GrantFiled: June 22, 2017Date of Patent: September 17, 2019Assignee: SOGANG UNIVERSITY RESEARCH FOUNDATIONInventors: Tae Soo Lee, Seung Hyun Ryu, Hyun Jin Cho, Seung Kwon Oh
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Publication number: 20190262570Abstract: A nasal cannula according to an embodiment of the present invention includes: an oxygen supplying portion which forms a space inside in which a nose and a mouth of a user can be disposed and is able to supply oxygen in a state of being put on by the user into the nose of the user; and a mask portion to which the oxygen supplying portion is attached in a detachable manner therein and is configured to be put on a face of the user. Since a space in which a nose and a mouth of a user can be disposed is provided inside the oxygen supplying portion so that a user can put on the nasal cannula in a convenient state and the oxygen supplying portion is put on in a state of being supported by the mask portion, oxygen can be supplied into the nose of the user and at the same time external air can be filtered.Type: ApplicationFiled: August 4, 2016Publication date: August 29, 2019Applicant: SOGANG UNIVERSITY RESEARCH FOUNDATIONInventors: Tae-Soo LEE, Seung Kwon OH, Seung Hyun RYU, Bong Kwan SON, Sung Hun HA, Dong Min SHIN, Yong Sang SHIN
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Patent number: 10137402Abstract: A gas concentration device according to an embodiment of the present invention includes: an air supplier supplying pressurized air; a plurality of adsorption beds which separate pressurized air supplied from the air supplier into product gas and purge gas by a pressure swing adsorption method and discharge the separated product gas and purge gas; a flow passage regulating valve unit which regulates flow passages so as to allow the pressurized air to be supplied to the adsorption bed from the air supplier and so as to reduce pressure of the adsorption bed so that a nitrogen adsorption process and a nitrogen desorption process are alternately performed; and a pressure boosting unit which is configured to be fed with the purge gas and the product gas discharged from the adsorption bed and is configured to pressurize the product gas in multi-stage sequentially using the purge gas and the product gas.Type: GrantFiled: February 15, 2017Date of Patent: November 27, 2018Assignee: OXUS CO., LTD.Inventors: Tae Soo Lee, Hyeon Seong Kim, Shin Kyu Han, Seung Kwon Oh, Loren Mitchell Thompson
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Publication number: 20180229176Abstract: A gas concentration device according to an embodiment of the present invention includes: an air supplier supplying pressurized air; a plurality of adsorption beds which separate pressurized air supplied from the air supplier into product gas and purge gas by a pressure swing adsorption method and discharge the separated product gas and purge gas; a flow passage regulating valve unit which regulates flow passages so as to allow the pressurized air to be supplied to the adsorption bed from the air supplier and so as to reduce pressure of the adsorption bed so that a nitrogen adsorption process and a nitrogen desorption process are alternately performed; and a pressure boosting unit which is configured to be fed with the purge gas and the product gas discharged from the adsorption bed and is configured to pressurize the product gas in multi-stage sequentially using the purge gas and the product gas.Type: ApplicationFiled: February 15, 2017Publication date: August 16, 2018Applicant: OXUS CO., LTD.Inventors: Tae Soo LEE, Hyeon Seong KIM, Shin Kyu HAN, Seung Kwon OH, Loren Mitchell THOMPSON
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Publication number: 20180196015Abstract: A method for determining concentration and pressure of respective gas consisting of multi-gas using emitting and receiving of ultrasound includes: measuring a reference ultrasound flight time; measuring ultrasound flight times at plural concentrations, temperatures and pressures; obtaining an ultrasound flight time table comprising ultrasound flight time change values which are differences between the reference ultrasound flight time, which varies according to parameters of concentration, temperature and pressure, and the measured ultrasound flight time; obtaining an ultrasound amplitude table comprising ultrasound amplitude values of a waveform of a predetermined sequence of the received ultrasound waveform at plural concentrations, temperatures and pressures in a state that concentration, temperature and pressure of the target respective gas are parameters; and calculating the concentration and the pressure of the target gas based on performing temperature compensations for the ultrasound flight time changeType: ApplicationFiled: June 22, 2017Publication date: July 12, 2018Applicant: SOGANG UNIVERSITY RESEARCH FOUNDATIONInventors: Tae Soo LEE, Seung Hyun RYU, Hyun Jin CHO, Seung Kwon OH
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Publication number: 20180177972Abstract: An oxygen delivery method for delivering oxygen stored in an oxygen tank to a recipient according to an embodiment of the present invention includes: receiving a prescription flow that is an oxygen delivery flow prescribed to the recipient; receiving a saving ratio, the saving ratio being input by the recipient and being a ratio of a prescription flow and an average delivery flow; selecting an oxygen delivery mode among a plurality of preset oxygen delivery modes based on the saving ratio; detecting a breathing pressure of the recipient; and controlling an oxygen delivery flow to the recipient based on the prescription flow, the saving ratio and detected breathing pressure.Type: ApplicationFiled: February 9, 2018Publication date: June 28, 2018Applicant: OXUS CO., LTD.Inventors: Tae-Soo LEE, Yoon-Sun CHOI, Seung-Kwon OH, Gil-Jun LEE
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Patent number: 9675926Abstract: An oxygen concentrating apparatus includes: at least one adsorption bed which is filled with absorbent capable of selectively adsorbing nitrogen relative to oxygen; an air supplier which supplies pressurized air to the adsorption bed; a flow channel regulating valve unit which regulates flow channels by allowing the pressurized air to be supplied to the adsorption bed from the air supplier and by allowing the air to be discharged from the adsorption bed to be depressurized such that a nitrogen adsorption process and a nitrogen desorption process are alternately performed; and a water removing unit which separates water from the pressurized air supplied from the air supplier and removes the separated water. The flow channel regulating unit and the water removing unit are at least partially housed within a single housing.Type: GrantFiled: September 9, 2015Date of Patent: June 13, 2017Assignee: OXUS CO., LTD.Inventors: Tae Soo Lee, Hyun Seong Kim, Shin Kyu Han, Seung Kwon Oh, Kang Han Lee
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Publication number: 20170065926Abstract: An oxygen concentrating apparatus includes: at least one adsorption bed which is filled with absorbent capable of selectively adsorbing nitrogen relative to oxygen; an air supplier which supplies pressurized air to the adsorption bed; a flow channel regulating valve unit which regulates flow channels by allowing the pressurized air to be supplied to the adsorption bed from the air supplier and by allowing the air to be discharged from the adsorption bed to be depressurized such that a nitrogen adsorption process and a nitrogen desorption process are alternately performed; and a water removing unit which separates water from the pressurized air supplied from the air supplier and removes the separated water. The flow channel regulating unit and the water removing unit are at least partially housed within a single housing.Type: ApplicationFiled: September 9, 2015Publication date: March 9, 2017Applicant: SOGANG UNIVERSITY RESEARCH FOUNDATIONInventors: Tae Soo LEE, Hyun Seong KIM, Shin Kyu HAN, Seung Kwon OH, Kang Han LEE
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Publication number: 20140352697Abstract: The oxygen delivery apparatus comprises: an oxygen tank; an outlet valve unit configured to include a variable flow valve capable of variably controlling the amount of oxygen, a pressure sensor, and a control unit controlling the operation of the outlet valve unit on the basis of a signal from the pressure sensor in order to control the amount of oxygen delivered to a recipient. The control unit controls the outlet valve unit on the basis of the pressure signal and an oxygen delivery mode selected from among a plurality of preset oxygen delivery modes, receives a prescribed flow (that is a prescribed oxygen delivery flow) and a target average consumed flow, selects one of the plurality of oxygen delivery modes according to the size of a obtained saving ratio obtained as ratio of the input prescribed flow and the target average consumed flow, and controls the delivery of oxygen on the basis of the selected mode.Type: ApplicationFiled: December 26, 2011Publication date: December 4, 2014Applicant: OXUS CO., LTD.Inventors: Tae-Soo Lee, Yoon-Sun Choi, Seung-Kwon Oh, Gil-Jun Lee
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Patent number: 8349053Abstract: A high efficiency gas concentrating apparatus includes an air compressor for supplying high pressure air, first and second adsorption towers that are disposed above the air compressor and communicating with the air compressor to adsorb nitrogen and concentrate oxygen as the high pressure air is alternately supplied thereto, first and second concentrating passages that are disposed above the respective first and second adsorption towers to discharge the concentrated oxygen, and a cleaning tank that is disposed between the first and second concentrating passages to receive a portion of the concentrated oxygen from one of the first and second adsorption towers, temporarily store the received concentrated oxygen therein, and alternately remove adsorbed nitrogen by supplying the temporarily concentrated oxygen to the other of the first and second adsorption towers.Type: GrantFiled: February 8, 2010Date of Patent: January 8, 2013Assignees: Oxus Co., Ltd., Sogang University Industry-University Cooperation FoundationInventors: Tae Soo Lee, Yoon Sun Choi, Seung Kwon Oh, Shin Kyu Han
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Publication number: 20110154986Abstract: A high efficiency gas concentrating apparatus includes an air compressor for supplying high pressure air, first and second adsorption towers that are disposed above the air compressor and communicating with the air compressor to adsorb nitrogen and concentrate oxygen as the high pressure air is alternately supplied thereto, first and second concentrating passages that are disposed above the respective first and second adsorption towers to discharge the concentrated oxygen, and a cleaning tank that is disposed between the first and second concentrating passages to receive a portion of the concentrated oxygen from one of the first and second adsorption towers, temporarily store the received concentrated oxygen therein, and alternately remove adsorbed nitrogen by supplying the temporarily concentrated oxygen to the other of the first and second adsorption towers.Type: ApplicationFiled: February 8, 2010Publication date: June 30, 2011Applicants: OXUS CO., LTD, Sogang University Industry-University Cooperation FoundationInventors: Tae Soo Lee, Yoon Sun Choi, Seung Kwon Oh, Shin Kyu Han