Patents by Inventor Chang-Ho Choi
Chang-Ho 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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Patent number: 11958002Abstract: A pre-coating filter device includes: a filtration tank comprising a raw water inlet through which raw water flows on one side, and a drain port at the bottom; a top cover coupled to the upper part of the filtration tank and comprising a coupling hole through the middle part; a purified water discharge pipe coupled to the coupling hole of the top cover; a purified water storage space unit coupled to the lower part of the top cover and located within the filtration tank, and comprising a communication pipe connected to the central part; a filter coupling plate body coupled to the lower part of the purified water storage space unit and comprising a plurality of coupling holes through; and a pre-coating filter coupled to the coupling hole of the filter coupling plate body.Type: GrantFiled: June 29, 2020Date of Patent: April 16, 2024Assignee: K-1ECOTECH CO., LTD.Inventors: Jong Hak Kim, Chang Hyoung Choi, Sang Ho Sung
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Publication number: 20240120275Abstract: A metal wiring of a semiconductor device may include: a first metal line disposed in a first metal layer, and defined with an opening in a first region; and a contact metal passing through a dielectric layer under the first metal layer adjacent to the opening and connected to the first metal line around the opening.Type: ApplicationFiled: May 1, 2023Publication date: April 11, 2024Inventors: Seong Ho CHOI, Chang Man SON
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Publication number: 20240118196Abstract: In the case of a gas in which several gases are mixed, a type and concentration of the gas may be incorrectly measured when measured using only an optical band-pass filter. The invention of the present application is directed to providing a technology in which a plurality of broadband band-pass filters having overlapping regions are provided to calculate a magnitude of absorption for each wavelength band for light passing through each broadband band-pass filter, thereby identifying the presence of a gas of interest and the presence of a gas other than the gas of interest.Type: ApplicationFiled: September 8, 2023Publication date: April 11, 2024Inventors: Cheol Woo NAM, Byung Yul MOON, Eung Yul KIM, Jae Hwan KIM, Chun Ho SHIN, Kwang Hun PARK, Myun Gu CHOI, Chang Hwang CHOI, Yong Geol KIM, Jae Min JEON
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Patent number: 11953552Abstract: The present disclosure relates to a system and apparatus for monitoring a partial discharge in a switchboard, including a plurality of partial discharge sensors provided in each of a plurality of switchboards to acquire partial discharge data generated in at least one switchboard, and a noise sensor provided in any one of the plurality of switchboards to acquire noise data to be differentiated from the partial discharge data acquired from the at least one partial discharge sensor, and it can be applied to other exemplary embodiments.Type: GrantFiled: July 16, 2019Date of Patent: April 9, 2024Assignee: LS ELECTRIC CO., LTD.Inventors: Chang Hwan Jin, Jong Ung Choi, Hyun Ho Kwon, Gwang Goo Kang, Jin Ho Lee
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Patent number: 11944958Abstract: Disclosed herein are a catalyst for hydrocracking reaction of high molecular weight components in bio-oil, a method for preparing the same and a method for bio-oil upgrading using the same. The catalyst includes a zeolite carrier; and at least one metal selected from the group consisting of nickel (Ni), ruthenium (Ru) and cerium (Ce) supported on the carrier. The catalyst promotes the hydrocracking of high molecular weight compounds contained in the bio-oil, but also inhibits the polymerization reaction of the decomposed product, thereby more effectively enhancing the hydrocracking reaction of the bio-oil.Type: GrantFiled: July 18, 2022Date of Patent: April 2, 2024Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Chunjae Yoo, Jeong-Myeong Ha, Dong Jin Suh, Jae Wook Choi, Young Hyun Yoon, Kyeongsu Kim, Chang Soo Kim, Kwang Ho Kim, Thi Lien Do
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Solution composition for surface treatment of steel sheet and surface-treated steel sheet using same
Patent number: 11939489Abstract: Provided is a composition for surface treatment of a steel sheet, the composition having excellent resistance to an acid, such as sulfuric acid, and to a coated steel sheet to which the composition for surface treatment is applied, wherein the composition for surface treatment comprises 30-50% wt % of colloidal silica containing 5-20 nm-sized silica, 40-60% wt % of silane containing three or more alkoxy groups, 5-15 wt % of an acrylate-based organic monomer, 0.01-1 wt % of an acid, and 1-15 wt % of a solvent.Type: GrantFiled: September 28, 2017Date of Patent: March 26, 2024Assignees: POSCO CO., LTD, NOROO COIL COATINGS CO., LTD.Inventors: Chang-Hoon Choi, Dong-Yun Kim, Min-Ho Jo, Jae-Duck Ko, Won-Ho Son, Jong-Hwa Kim -
Publication number: 20240086603Abstract: A method of reinforcement learning of a neural network device for generating a verification vector for verifying a circuit design comprising a circuit block includes inputting a test vector to the circuit block, generating one or more rewards based on a coverage corresponding to the test vector, the coverage being determined based on a state transition of the circuit block based on the test vector, and applying the one or more rewards to a reinforcement learning.Type: ApplicationFiled: November 16, 2023Publication date: March 14, 2024Applicant: SAMSUNG ELECTRONICS CO, LTD.Inventors: In HUH, Jeong-hoon KO, Hyo-jin CHOI, Seung-ju KIM, Chang-wook JEONG, Joon-wan CHAI, Kwang-II PARK, Youn-sik PARK, Hyun-sun PARK, Young-min OH, Jun-haeng LEE, Tae-ho LEE
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Publication number: 20240080320Abstract: A server according to an embodiment includes a processor configured to receive a friend add request for a target account from a user terminal accessed with a user account; based on one of the user account and the target account being a protected account, transmit an approval request for the friend add request to a protector account connected to the protected account; and based on receiving a reply to the approval request from the protector terminal, add the target account to a friend list of the user account.Type: ApplicationFiled: April 27, 2023Publication date: March 7, 2024Inventors: You Jin KIM, Jung Woo CHOI, Jenog Ryeol CHOI, Joong Seon KIM, Hong Chan YUN, Ju Ho CHUNG, Do Hyun YOUN, Hyung Min KIM, Hyun Ok CHOI, Chun Ho KIM, Soo Beom KIM, Min Jeong KIM, Chang Oh HEO, Eun Soo HEO
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Patent number: 11925080Abstract: A display device includes a substrate including a display area and a non-display area, a plurality of pixels disposed in the display area, a common voltage supply wiring overlapping the non-display area and disposed on the substrate, a driving voltage supply wiring overlapping the non-display area and disposed on the substrate, and a data voltage supply wiring overlapping the non-display area and electrically connected to the plurality of pixels, where at least one of the common voltage supply wiring and the driving voltage supply wiring includes a chamfered area, the data voltage supply wiring includes a first data voltage supply wiring, a second data voltage supply wiring, and a third data voltage supply wiring, and the first to third data voltage supply wirings are disposed in different layers.Type: GrantFiled: July 20, 2021Date of Patent: March 5, 2024Assignee: SAMSUNG DISPLAY CO., LTD.Inventors: Jae-Ho Choi, Won Kyu Kwak, Chang Soo Pyon, Seung Gyu Tae
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Publication number: 20230283563Abstract: An autonomous quality of service provisioning apparatus and method are disclosed. The apparatus includes a parameter extraction unit receiving a packet transmitted from a transmitting terminal and extracting QoS parameters by analyzing the received packet; and a quality of service reservation unit configured to be associated with a controller that manages and controls resources of the network to request the controller to reserve resources corresponding to the extracted QoS parameters.Type: ApplicationFiled: March 1, 2023Publication date: September 7, 2023Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Do Young KIM, Sun Me KIM, Taesik CHEUNG, Tae Kyu KANG, Jeong-dong RYOO, Yeoncheol RYOO, Chang-ho CHOI
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Patent number: 11674875Abstract: A fluid medium monitoring apparatus of the present invention comprises: a light source unit for irradiating light; a first collimator unit for collimating light irradiated from the light source unit; a flow cell unit in which a fluid medium flows and light is allowed to absorb the wavelength of the fluid medium while proceeding along the moving direction of the fluid medium; and a light detection unit for detecting the wavelength of the light passing through the flow cell unit.Type: GrantFiled: March 20, 2020Date of Patent: June 13, 2023Assignees: ZEUS CO., LTD., ZEUS ENP CO., LTD.Inventors: Hyun Kook Park, Chang Ho Choi, Seong Hwan Park
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Publication number: 20220303083Abstract: When a transmitting apparatus wants to transmit a preemptable frame, the transmitting apparatus transmits a preemptable packet by a custom preamble including frame length information on a payload of the preemptable frame to the payload of the preemptable frame. A receiving apparatus determines whether a received preemptable frame is fragmented using frame length information set in the custom preamble of the received preemptable frame. As described above, since it is possible to check whether the received frame is fragmented using the frame length information set in the custom preamble, there is no need to perform CRC calculation to determine whether the received frame is fragmented as in the prior art.Type: ApplicationFiled: November 17, 2021Publication date: September 22, 2022Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Chang-Ho CHOI, Taesik CHEUNG, Tae Kyu KANG, Jeong-Dong RYOO, Woo Young CHOI
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Publication number: 20220057314Abstract: A fluid medium monitoring apparatus of the present invention comprises: a light source unit for irradiating light; a first collimator unit for collimating light irradiated from the light source unit; a flow cell unit in which a fluid medium flows and light is allowed to absorb the wavelength of the fluid medium while proceeding along the moving direction of the fluid medium; and a light detection unit for detecting the wavelength of the light passing through the flow cell unit.Type: ApplicationFiled: March 20, 2020Publication date: February 24, 2022Applicants: ZEUS CO., LTD., ZEUS ENP CO., LTD.Inventors: Hyun Kook PARK, Chang Ho CHOI, Seong Hwan PARK
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Patent number: 11060482Abstract: The present invention relates to a liquid rocket engine using a booster pump driven by an electric motor, and more particularly, to a liquid rocket engine using a booster pump driven by an electric motor in which a booster pump is installed between a propellant tank and a propellant pump so that a requirement for an inlet pressure of the propellant pump may be met even in a state in which an internal pressure of the propellant tank is reduced, resulting in reduced amount of a propellant and reduced weight of the propellant tank, and the electric motor configured to drive the booster pump may be efficiently cooled through an oxidant, a cooling line, and the like.Type: GrantFiled: September 13, 2016Date of Patent: July 13, 2021Assignee: KOREA AEROSPACE RESEARCH INSTITUTEInventors: Hyun Duck Kwak, Jin Han Kim, Dae Jin Kim, Chang Ho Choi
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Patent number: 10659374Abstract: A frame transmission controlling apparatus includes: a list configuration unit managing a parameter related to a gate control; a cycle timer unit managing a start timing of a cycle; a list executing unit performing the gate control based on the parameter, wherein the list executing unit includes: a cycle executing state machine setting an expiration time of at least one section included in the cycle, checking gate operation information corresponding to a list pointer indicating the at least one section, and performing a control corresponding to the gate operation information; a delaying state machine deducting and updating the expiration time by a predetermined unit; a cycle holding state machine generating a control signal indicating stopping transmission in MAC; and a cycle releasing state machine generating a control signal indicating resuming the transmission in MAC.Type: GrantFiled: September 27, 2018Date of Patent: May 19, 2020Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Chang Ho Choi, Tae Kyu Kang, Jeong Dong Ryoo, Tae Sik Cheung
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Publication number: 20190104073Abstract: A frame transmission controlling apparatus includes: a list configuration unit managing a parameter related to a gate control; a cycle timer unit managing a start timing of a cycle; a list executing unit performing the gate control based on the parameter, wherein the list executing unit includes: a cycle executing state machine setting an expiration time of at least one section included in the cycle, checking gate operation information corresponding to a list pointer indicating the at least one section, and performing a control corresponding to the gate operation information; a delaying state machine deducting and updating the expiration time by a predetermined unit; a cycle holding state machine generating a control signal indicating stopping transmission in MAC; and a cycle releasing state machine generating a control signal indicating resuming the transmission in MAC.Type: ApplicationFiled: September 27, 2018Publication date: April 4, 2019Inventors: Chang Ho CHOI, Tae Kyu KANG, Jeong Dong RYOO, Tae Sik CHEUNG
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Publication number: 20180230948Abstract: The present invention relates to a liquid rocket engine using a booster pump driven by an electric motor, and more particularly, to a liquid rocket engine using a booster pump driven by an electric motor in which a booster pump is installed between a propellant tank and a propellant pump so that a requirement for an inlet pressure of the propellant pump may be met even in a state in which an internal pressure of the propellant tank is reduced, resulting in reduced amount of a propellant and reduced weight of the propellant tank, and the electric motor configured to drive the booster pump may be efficiently cooled through an oxidant, a cooling line, and the like.Type: ApplicationFiled: September 13, 2016Publication date: August 16, 2018Applicant: KOREA AEROSPACE RESEARCH INSTITUTEInventors: Hyun Duck KWAK, Jin Han KIM, Dae Jin KIM, Chang Ho CHOI
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Publication number: 20180230947Abstract: The present invention relates to a liquid rocket engine using a pump driven by an electric motor, and more particularly, to a liquid rocket engine using a pump driven by an electric motor instead of using a gas generator and a turbine so that a system may be simplified, and an overheated electric motor may be efficiently cooled by circulating a propellant (an oxidant or a fuel).Type: ApplicationFiled: September 13, 2016Publication date: August 16, 2018Applicant: KOREA AEROSPACE RESEARCH INSTITUTEInventors: Hyun Duck KWAK, Dae Jin KIM, Jin Han KIM, Hang Gi LEE, Chang Ho CHOI, Eun Hwan JEONG
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Patent number: 9763325Abstract: Highly conductive silver may be fabricated at room temperature using in-situ reactive silver precursor inks by microreactor-assisted printing without any post-processing. Reactive silver nanoinks, synthesized in-situ from the microreactor, may be directly delivered onto glass and polymeric substrates without any surface treatment to form a highly dense and uniform silver feature. The distribution of the reactive silver nanoinks can be controlled by adjusting the flow rate of the continuous flow. Silver lines may be fabricated using the in-situ reactive precursors delivered via a micro-channel applicator.Type: GrantFiled: April 7, 2016Date of Patent: September 12, 2017Assignee: Oregon State UniversityInventors: Chih-Hung Chang, Chang-Ho Choi
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Publication number: 20170229800Abstract: A midplane communication system includes: a midplane; at least one front daughter card configured to connect to a front side of the midplane; at least one rear daughter card configured to connect to a rear side of the midplane in a vertical direction relative to the front daughter card; and an orthogonal connector configured to electrically connect the front daughter card and the rear daughter card, wherein the orthogonal connector is configured to connect to the midplane at a vertical or horizontal offset to include at least one extra connection pin allowing an additional connection when connecting the front daughter card and the rear daughter card.Type: ApplicationFiled: August 15, 2016Publication date: August 10, 2017Inventors: Chang Ho CHOI, Tae Sik CHEUNG, Woo Young CHOI