Patents by Inventor Chan Ahn

Chan Ahn 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).

  • Patent number: 11609425
    Abstract: Augmented reality glasses with auto coregistration of an invisible field on visible reality which allows eyes to recognize a real space and precisely performs coregistration on only diagnosis and treatment information of invisible light, which is emitted from a specific area, to the real space.
    Type: Grant
    Filed: June 30, 2021
    Date of Patent: March 21, 2023
    Assignee: Pukyong National University Industry-University Cooperation Foundation
    Inventor: Yeh-Chan Ahn
  • Patent number: 11589802
    Abstract: The present invention relates to a real-time parathyroid imaging device, and a real-time parathyroid imaging device for displaying only a parathyroid in a thyroid with a separate mark, the real-time parathyroid imaging device including: a light source configured to emit light to a thyroid and excite a parathyroid; a detector configured to detect an emission spectrum of the parathyroid excited and emitted by the light source; an excitation filter disposed in front of the light source; and an emission filter disposed in front of the detector. When central Compartment Neck Dissection (CCND) for thyroidectomy is performed, the present invention clearly marks a parathyroid by an autofluorescent image, thereby allowing a surgeon to more simply and safely perform the CCND while leaving the parathyroid.
    Type: Grant
    Filed: September 4, 2017
    Date of Patent: February 28, 2023
    Assignee: PUKYONG NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
    Inventors: Yeh-Chan Ahn, Sung-Won Kim, Kang-Dae Lee, Hyoung-Shin Lee, Chul-Ho Oak, Seo-Hyun Song, Hyun-Wook Kang, Joon-Shik You
  • Publication number: 20230051601
    Abstract: Disclosed is a method for producing a stem cell with enhanced efficacy, a stem cell produced thereby, and a method for treating a disease using the same. According to the present invention, sizes of stem cells may be reduced and proliferation ability, differentiation potency, migration ability, and angiogenic potential of stem cells may be significantly enhanced by applying a culturing method provided herein. Thus the present invention may be usefully applied to development of therapeutic agents using stem cells.
    Type: Application
    Filed: December 16, 2020
    Publication date: February 16, 2023
    Inventors: Mijin Kim, Jong Chan Ahn, Seunghee Lee, Kwang-won Seo, Kyung-sun Kang
  • Patent number: 11559248
    Abstract: The present invention relates to a parathyroid sensing system, and includes: a modulator for generating a modulation signal having a predetermined frequency; a lock-in amplifier and a light source which receive information on the modulation signal; an excitation filter for transmitting, among light emitted from the light source, only excitation light that excites parathyroid glands; an emission filter connected to a probe and selectively transmitting only fluorescence emitted from the parathyroid glands; a near-infrared sensor for sensing the autofluorescence that has passed through the emission filter, and converting the sensed autofluorescence into an electric signal; and a speaker for generating an alarm through the electric signal. Through the present invention, the locations of the parathyroid glands may be precisely identified even when lights are turned on in an operating room, and convenience may be provided by alerting a surgeon by means of an alarm when the parathyroid glands are detected.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: January 24, 2023
    Assignees: PUKYONG NATIONAL UNIVERSITY INDUSTRYUNIVERSITY COOPERATION FOUNDATION, UNIST (ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)
    Inventors: Yeh-Chan Ahn, Sung Chul Bae
  • Publication number: 20220361842
    Abstract: The present invention relates to a portable probe for photoacoustic tomography, capable of performing line-by-line scanning or area-by-area scanning by using a small number of light inputs; and a real-time photoacoustic tomography device. The probe for photoacoustic tomography includes: a lens receiving light inputs from an optical fiber so as to make the same proceed as small diameter parallel light; a Powell lens receiving the small diameter parallel light and generating a line beam of a predetermined thickness, and allowing energy dispersed on a line to be uniform on the entire line; a lens making the line beam pass therethrough such that the line beam has a predetermined width and a reduced thickness so as to be line-focused at a target area; an acoustic reflection glass for separating, from a light path, an acoustic wave outputted from the target area; and an acoustic measurement unit for measuring acoustic strength.
    Type: Application
    Filed: July 29, 2022
    Publication date: November 17, 2022
    Applicant: PUKYONG NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
    Inventors: Chul Ho OAK, Eun Kee PARK, Jung-Eun PARK, Yeh Chan AHN
  • Publication number: 20220292997
    Abstract: A method for providing learning information is provided. The method includes the steps of: combining achievements of one or more learner groups for a plurality of learning units to derive learning achievement characteristic information of the one or more learner groups; combining achievements of a target learner for the plurality of learning units to derive learning achievement characteristic information of the target learner; comparing the learning achievement characteristic information of the target learner and the learning achievement characteristic information of the one or more learner groups; and providing learning information to the target learner according to a learning path of the one or more learner groups, on the basis of a result of the comparison.
    Type: Application
    Filed: July 24, 2020
    Publication date: September 15, 2022
    Applicant: CLASSCUBE CO., LTD.
    Inventor: Seong Chan AHN
  • Patent number: 11432798
    Abstract: The present invention relates to a portable probe for photoacoustic tomography, capable of performing line-by-line scanning or area-by-area scanning by using a small number of light inputs; and a real-time photoacoustic tomography device. The probe for photoacoustic tomography includes: a lens receiving light inputs from an optical fiber so as to make the same proceed as small diameter parallel light; a Powell lens receiving the small diameter parallel light and generating a line beam of a predetermined thickness, and allowing energy dispersed on a line to be uniform on the entire line; a lens making the line beam pass therethrough such that the line beam has a predetermined width and a reduced thickness so as to be line-focused at a target area; an acoustic reflection glass for separating, from a light path, an acoustic wave outputted from the target area; and an acoustic measurement unit for measuring acoustic strength.
    Type: Grant
    Filed: September 7, 2020
    Date of Patent: September 6, 2022
    Assignee: PUKYONG NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
    Inventors: Chul Ho Oak, Eun Kee Park, Jung-Eun Park, Yeh Chan Ahn
  • Patent number: 11334578
    Abstract: According to one aspect of the invention, there is provided a method for searching for documents containing mathematical expressions, the method comprising the steps of: dividing a first document containing mathematical expressions into a plurality of components; comparing the plurality of components with a plurality of other components extracted from a plurality of other documents, with reference to weights respectively assigned to the plurality of components according to types of the components; and determining a document associated with the first document among the plurality of other documents, with reference to a result of the comparison, wherein the weights are adaptively adjusted according to a result of the determination of the document associated with the first document.
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: May 17, 2022
    Assignee: CLASSCUBE CO., LTD.
    Inventor: Seong Chan Ahn
  • Publication number: 20220113288
    Abstract: An embodiment pertains to a method for evaluating efficacy of a drug which increases or decreases the secretion of a particular neurotransmitter, by measuring a concentration change of the particular neurotransmitter in a specific intracerebral site with reference to a brain map, the method comprising the steps of: selecting as a microdialysis target region in the brain map a first site of an animal, which corresponds to a site that the brain map represents as being the highest in the concentration of a first neurotransmitter of which the secretion is increased or decreased by the drug; and injecting the drug to the animal and monitoring a concentration change of the first neurotransmitter in the first site between pre- and post-injection of the drug.
    Type: Application
    Filed: February 12, 2020
    Publication date: April 14, 2022
    Inventors: Hyung Gun Kim, Sung Hyun Hong, Guk Hwa Jung, Hye Ran Park, Kee Chan Ahn, Hak Rim Kim
  • Publication number: 20220087520
    Abstract: Disclosed is a mobile colposcopy device for early diagnosis of cervical cancer, which includes an insertion unit which is inserted into the vagina of a woman, has a penetrating hole formed in one end coming into contact with the uterus, and is provided with a capturing path communicating with the penetrating hole, a capturing unit which is provided in the insertion unit so as to capture the cervix through the capturing path, and a lighting unit which is provided on the capturing path of the insertion unit and irradiates a lighting to the cervix through the penetrating hole. According to the present disclosure, the mobile colposcopy device for early diagnosis of cervical cancer can be simply and easily used so as to perform cervical cancer screening using a mobile colposcopy without environmental constraints including hospitals and allows women to early diagnose cervical cancer.
    Type: Application
    Filed: September 21, 2021
    Publication date: March 24, 2022
    Applicants: Pukyong National University Industry-University Cooperation Foundation, KOSIN UNIVERSITY INDUSTRY-ACADEMY COOPERATION
    Inventors: Yeh-Chan AHN, Daa Young KWON, Yi Keun KIM, Chul Ho OAK, Hang Goo YUN, Sung Won KIM
  • Publication number: 20220049333
    Abstract: The austenitic stainless steel that does not cause defects such as aging crack or delayed fracture even after the expansion and curling process of 5 steps or more is disclosed. In accordance with an aspect of the present disclosure, an austenitic stainless steel with excellent pipe expanding workability and aging crack resistance includes, in percent (%) by weight of the entire composition, C: 0.01 to 0.04%, Si: 0.1 to 1.0%, Mn: 0.1 to 2.0%, Cr: 16 to 20%, Ni: 6 to 10%, Cu: 0.1 to 2.0%, Mo: 0.2% or less, N: 0.035 to 0.07%, the remainder of iron (Fe) and other inevitable impurities, and the C+N satisfies 0.1% or less, the product of the Md30 (° C.) value and average grain size (?m) satisfies less than ?500.
    Type: Application
    Filed: August 22, 2019
    Publication date: February 17, 2022
    Inventors: Sang Seok KIM, Deok Chan AHN, Mi-Nam PARK, Hyun Woong MIN, Yung Min KIM
  • Publication number: 20220036491
    Abstract: A method for providing a customized education service to a learner is provided. The method includes the steps of: determining a personalized learning objective on the basis of at least one learning objective provided from a learner; determining an objective relevance for at least one learning unit associated with at least one of the learning objective and the personalized learning objective; and recommending the learner a learning solution associated with at least one learning unit for which the objective relevance is not less than a predetermined level, wherein the step of determining the personalized learning objective comprises the step of determining the personalized learning objective on the further basis of the determined objective relevance.
    Type: Application
    Filed: October 19, 2021
    Publication date: February 3, 2022
    Applicant: CLASSCUBE CO., LTD.
    Inventor: Seong Chan AHN
  • Publication number: 20220003992
    Abstract: Augmented reality glasses with auto coregistration of an invisible field on visible reality which allows eyes to directly recognize a real space and precisely performs coregistration on only diagnosis and treatment information of invisible light, which is emitted from a specific area, to the real space. The augmented reality glasses include a glasses body, an invisible light emission unit configured to emit invisible light toward a target object, an input unit configured to input the invisible light emitted from the target object together with visible light to a waveguide, an information processing unit configured to convert invisible light image information received from the input unit into visible light image information which is recognizable by a person, and an image output unit configured to receive the visible light image information processed in the information processing unit and output the received visible light image information to two eyeballs in the waveguide.
    Type: Application
    Filed: June 30, 2021
    Publication date: January 6, 2022
    Applicant: Pukyong National University Industry-University
    Inventor: Yeh-Chan AHN
  • Publication number: 20210310105
    Abstract: A Ti, Nb-added ferritic stainless steel with excellent low-temperature toughness of weld zone according to an embodiment of present disclosure includes, in percent (%) by weight of the entire composition, C: 0.004 to 0.015%, N: 0.004 to 0.015%, Si: 0.01 to 0.7%, Mn: 0.01 to 0.7%, P: 0.0001 to 0.04%, S: 0.0001 to 0.005%, Cr: 10 to 30%, Al: 0.005 to 0.04%, Ti: 0.1 to 0.5%, Nb: 0.1 to 0.6%, Ca: 0.0001 to 0.003%, the remainder of iron (Fe) and other inevitable impurities, satisfies the following equation (1), and Al—Ca—Ti—Mg—O-based oxide and Ti—Nb—C—N carbonitride containing the oxide have an average diameter of 3 to 10 ?m and a distribution density of 4/mm2 or more. {(Ti+0.5*Nb)*(C+N)}/Al>0.
    Type: Application
    Filed: November 2, 2018
    Publication date: October 7, 2021
    Applicant: POSCO
    Inventors: Jong Chul Kim, Wan-Yi Kim, Il Chan Jung, Jin-Suk Kim, Deok Chan Ahn
  • Patent number: 11050075
    Abstract: In some variations, a hydrogen-storage material formulation comprises: a solid hydrogen-storage material containing at least one metal and hydrogen that is bonded with the metal; and a liquid electrolyte that is ionically conductive for at least one ion derived from the hydrogen-storage material. The liquid electrolyte may be from 5 wt % to about 20 wt % of the hydrogen-storage material formulation, for example. Many materials are possible for both the hydrogen-storage material as well as the liquid electrolyte. The hydrogen-storage material has a higher hydrogen evolution rate in the presence of the liquid electrolyte compared to a hydrogen-storage material without the liquid electrolyte. This is experimentally demonstrated with a destabilized metal hydride, MgH2/Si system, incorporating a LiI—KI—CsI ternary eutectic salt as the liquid electrolyte. Inclusion of the liquid electrolyte gives a ten-fold increase in H2 evolution rate at 250° C., reaching 3.5 wt % hydrogen released in only 7 hours.
    Type: Grant
    Filed: March 22, 2018
    Date of Patent: June 29, 2021
    Assignee: HRL Laboratories, LLC
    Inventors: John J. Vajo, Jason A. Graetz, Channing Ahn, Dan Addison, Hongjin Tan, Jasim Uddin
  • Publication number: 20210147966
    Abstract: Provided is a ferritic stainless steel for an exhaust system heat exchanger and a method of manufacturing the same. The ferritic stainless steel includes, in percent (%) by weight of the entire composition, 0.003 to 0.1% of carbon (C), 0.01 to 2.0% of silicon (Si), 0.01 to 1.5% of manganese (Mn), 0.05% or less of phosphorus (P), 0.005% or less of sulfur (S), 10 to 30% of chromium (Cr), 0.001 to 0.10% of titanium (Ti), 0.001 to 0.15% of aluminum (Al), 0.003 to 0.03% of nitrogen (N), 0.3 to 0.6% of niobium (Nb), 0.01 to 2.5% of molybdenum (Mo), and the remainder of iron (Fe) and other inevitable impurities, wherein TiN precipitates having a size of 0.1 ?m or more are distributed in a surface layer of a ferrite matrix at a concentration of 2.5*104 ea/mm2 or less.
    Type: Application
    Filed: November 22, 2016
    Publication date: May 20, 2021
    Inventors: Il Chan Jung, Jong Chul Kim, Jae Hong Shim, Deok Chan Ahn, Jin Suk Kim
  • Publication number: 20210089546
    Abstract: According to one aspect of the invention, there is provided a method for searching for documents containing mathematical expressions, the method comprising the steps of: dividing a first document containing mathematical expressions into a plurality of components; comparing the plurality of components with a plurality of other components extracted from a plurality of other documents, with reference to weights respectively assigned to the plurality of components according to types of the components; and determining a document associated with the first document among the plurality of other documents, with reference to a result of the comparison, wherein the weights are adaptively adjusted according to a result of the determination of the document associated with the first document.
    Type: Application
    Filed: April 5, 2018
    Publication date: March 25, 2021
    Applicant: CLASSCUBE CO., LTD.
    Inventor: Seong Chan AHN
  • Patent number: 10943499
    Abstract: A method for providing learning information is provided. The method includes: with reference to two or more supplementary learning patterns experienced by a learner, determining an personalized frequency index related to at least one learning unit commonly included in the two or more supplementary learning patterns; and determining a learning unit having a personalized frequency index higher than or equal to a pre-configured reference, as a personalized supplementary learning unit to be provided to the learner. Each of the two or more supplementary learning patterns includes two or more learning units having a predetermined correlation, and the predetermined correlation is acquired from a knowledge map, which includes two or more nodes corresponding to the two or more learning units and at least one link which connects the two or more nodes and is assigned the correlation between the two or more learning units.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: March 9, 2021
    Assignee: CLASSCUBE CO., LTD.
    Inventors: Seong Chan Ahn, Young Don Kim
  • Publication number: 20200397404
    Abstract: The present invention relates to a portable probe for photoacoustic tomography, capable of performing line-by-line scanning or area-by-area scanning by using a small number of light inputs; and a real-time photoacoustic tomography device. The probe for photoacoustic tomography includes: a lens receiving light inputs from an optical fiber so as to make the same proceed as small diameter parallel light; a Powell lens receiving the small diameter parallel light and generating a line beam of a predetermined thickness, and allowing energy dispersed on a line to be uniform on the entire line; a lens making the line beam pass therethrough such that the line beam has a predetermined width and a reduced thickness so as to be line-focused at a target area; an acoustic reflection glass for separating, from a light path, an acoustic wave outputted from the target area; and an acoustic measurement unit for measuring acoustic strength.
    Type: Application
    Filed: September 7, 2020
    Publication date: December 24, 2020
    Applicant: PUKYONG NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION
    Inventors: Chul Ho OAK, Eun Kee PARK, Jung-Eun PARK, Yeh Chan AHN
  • Publication number: 20200385837
    Abstract: A ferritic stainless steel for automotive exhaust system parts with improved expandability is disclosed. A ferritic stainless steel with improved expandability according to an embodiment of the present disclosure includes, in percent (%) by weight of the entire composition, Cr: 10 to 25%, N: 0.015% or less (excluding 0), Al: 0.005 to 0.04%, Nb: 0.1 to 0.6%, Ti: 0.1 to 0.
    Type: Application
    Filed: October 5, 2018
    Publication date: December 10, 2020
    Inventors: Il Chan Jung, Young Min Seo, Deok Chan Ahn