Patents by Inventor Dong Keun Han

Dong Keun Han 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).

  • Publication number: 20250086931
    Abstract: A method and apparatus with neural network based image processing are provided. The method includes: accessing an input image set including a visible light image of a visible light wavelength band corresponding to an input image and an infrared image of an infrared wavelength band corresponding to the input image; estimating an illumination map representing an illumination configuration of the input image based on a first input image set of the input image set; estimating a confidence score map of the input image based on spectral information of a second input image set of the input image set; and determining illuminant information of the input image by combining the illumination map and the confidence score map.
    Type: Application
    Filed: August 30, 2024
    Publication date: March 13, 2025
    Applicants: Samsung Electronics Co., Ltd., Korea University Research and Business Foundation
    Inventors: Jong-Ok Kim, Dong-Keun Han
  • Publication number: 20240299626
    Abstract: Provided are a biodegradable polymer scaffold including bioactive materials and methods of manufacturing the same. The biodegradable polymer scaffold, preventing inflammatory responses caused by acidic substances produced during a degradation process, has easily controllable mechanical strength, and includes bioactive materials derived from cells of target tissues, and thus may induce tissue regeneration more effectively.
    Type: Application
    Filed: March 8, 2022
    Publication date: September 12, 2024
    Applicant: CHA UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION
    Inventors: Dong Keun HAN, Kyoung-Won KO, So-Yeon PARK
  • Publication number: 20240144640
    Abstract: Provided is a method and an apparatus for processing an image based on a neural network. The method includes forming an input image set by combining a visible light image and an infrared image, estimating an illuminant map representing an illuminant configuration of the input image set and a confidence score map representing a correlation between the visible light image and the infrared image, using a neural network model, and determining illuminant information of the visible light image based on the illuminant map and the confidence score map.
    Type: Application
    Filed: March 31, 2023
    Publication date: May 2, 2024
    Inventors: Jong Ok KIM, Jeong Won HA, Dong Keun HAN
  • Publication number: 20230400406
    Abstract: Disclosed are a material classification apparatus and method based on a multi-spectral NIR band. A material classification apparatus based on a multi-spectral NIR band includes: an input unit configured to acquire a multi-band NIR image of a target; an attention module configured to generate a spatio-spectral correlation map considering spatial information on the multi-band NIR image and a correlation between each band; and a classification model unit configured to analyze the spatio-spectral correlation map and output a material classification label for the target.
    Type: Application
    Filed: June 9, 2023
    Publication date: December 14, 2023
    Applicant: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Jong Ok KIM, Dong Keun HAN
  • Patent number: 11332479
    Abstract: Provided is a pharmaceutical composition for preventing and treating tumors, the pharmaceutical composition including an imidazooxazole derivative compound, a solvate, a stereoisomer, or a pharmaceutically acceptable salt thereof as an active ingredient. The pharmaceutical composition is administered to an entity which has developed a tumor or is in danger of developing a tumor, and thus tumors can be prevented or treated.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: May 17, 2022
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Gamal El-din Mahmoud, Hong Seok Choi, Kyung Ho Yoo, Dong Keun Han, Chang Hyun Oh, Abdel-Maksoud Mohammed, I. El-Gamal Mohammed, Usama M. Ammar
  • Publication number: 20200131199
    Abstract: Provided is a pharmaceutical composition for preventing and treating tumors, the pharmaceutical composition including an imidazooxazole derivative compound, a solvate, a stereoisomer, or a pharmaceutically acceptable salt thereof as an active ingredient. The pharmaceutical composition is administered to an entity which has developed a tumor or is in danger of developing a tumor, and thus tumors can be prevented or treated.
    Type: Application
    Filed: December 31, 2019
    Publication date: April 30, 2020
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Gamal El-din MAHMOUD, Hong Seok CHOI, Kyung Ho YOO, Dong Keun HAN, Chang Hyun OH, Abdel-Maksoud MOHAMMED, I. El-Gamal MOHAMMED, Usama M. AMMAR
  • Patent number: 10570155
    Abstract: Provided is a pharmaceutical composition for preventing and treating tumors, the pharmaceutical composition including an imidazooxazole derivative compound, a solvate, a stereoisomer, or a pharmaceutically acceptable salt thereof as an active ingredient. The pharmaceutical composition is administered to an entity which has developed a tumor or is in danger of developing a tumor, and thus tumors can be prevented or treated.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: February 25, 2020
    Assignee: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Gamal El-din Mahmoud, Hong Seok Choi, Kyung Ho Yoo, Dong Keun Han, Chang Hyun Oh, Abdel-Maksoud Mohammed, I. El-Gamal Mohammed
  • Publication number: 20190211032
    Abstract: Provided is a pharmaceutical composition for preventing and treating tumors, the pharmaceutical composition including an imidazooxazole derivative compound, a solvate, a stereoisomer, or a pharmaceutically acceptable salt thereof as an active ingredient. The pharmaceutical composition is administered to an entity which has developed a tumor or is in danger of developing a tumor, and thus tumors can be prevented or treated.
    Type: Application
    Filed: July 3, 2017
    Publication date: July 11, 2019
    Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Gamal El-din MAHMOUD, Hong Seok CHOI, Kyung Ho YOO, Dong Keun HAN, Chang Hyun OH, Abdel-Maksoud MOHAMMED, I. El-Gamal MOHAMMED
  • Patent number: 10106402
    Abstract: Disclosed are biomedical implants comprising surface-modified metal particles and biodegradable polymers; its use for suppressing inflammation; and a method for preparing a biomedical material, comprising: (a) modifying surface of basic metal particles with a polymer to obtain surface-modified metal particles; and (b) mixing the surface-modified metal particles with a biodegradable polymer, followed by manufacturing a biodegradable biomedical implant, or coating the resulting mixture on a conventional biomedical implant.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: October 23, 2018
    Assignee: Korea Institute of Science and Technology
    Inventors: Dong Keun Han, Kwi Deok Park, Jong Hee Kang, Bong Soo Lee, Ji Yeon Choi, Chang Hun Kum
  • Patent number: 9968712
    Abstract: Provided is an organic/inorganic hybrid-porous biodegradable polymer scaffold, which includes basic ceramic nanoparticles, an animal tissue or cell-derived bioactive first extracellular matrix material, and a biodegradable polymer and in which inner walls of pores are coated with a second extracellular matrix material.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: May 15, 2018
    Assignee: Korea Institute of Science and Technology
    Inventors: Dong Keun Han, Yoon Ki Joung, Eugene Lih, Yun Ah Kim
  • Publication number: 20180117218
    Abstract: Provided is an organic/inorganic hybrid-porous biodegradable polymer scaffold, which includes basic ceramic nanoparticles, an animal tissue or cell-derived bioactive first extracellular matrix material, and a biodegradable polymer and in which inner walls of pores are coated with a second extracellular matrix material.
    Type: Application
    Filed: December 13, 2016
    Publication date: May 3, 2018
    Applicant: Korea Institute of Science and Technology
    Inventors: Dong Keun HAN, Yoon Ki JOUNG, Eugene LIH, Yun Ah KIM
  • Patent number: 9212259
    Abstract: A donor capable of controlled release of nitric monoxide and a prosthetic implant whose surface is coated with this donor are disclosed. The donor comprises a main chain of an organic polymer and a side chain that is covalently linked to the main chain and has a diazeniumdiolate functional group. The donor for controlled release of nitric monoxide exists in a fluid state such as liquid at room temperature and undergoes a sol-to-gel phase transition at a physiological pH as the temperature increases above the critical temperature. The critical temperature of the phase transition is in the range of 25 to 35° C., and the gel is a hydrogel without chemical cross-links.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: December 15, 2015
    Assignee: POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Won Jong Kim, Yanggy Lee, Kwideok Park, Jihoon Kim, Dong Keun Han
  • Patent number: 8956643
    Abstract: The present invention relates to an intelligent porous biodegradable polymer scaffold for in situ tissue regeneration in which two kinds of physiologically active substances having high differentiation potential and biocompatibility are introduced into the polymer scaffold and conjugated to the surface thereof, respectively, and a method for the preparation thereof. Since the intelligent porous biodegradable polymer scaffold exhibits improved biocompatibility and differentiation potential due to the introduction of physiologically active substances capable of efficiently inducing cell proliferation and differentiation into both the surface and the inside thereof, it can directly induce in situ tissue regeneration of the musculoskeletal system from stem cells in a living tissue after transplanting the polymer scaffold and stem cells into a human body without additional in vitro cultivation.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: February 17, 2015
    Assignee: Korea Institute of Science and Technology
    Inventors: Dong Keun Han, Kwideok Park, Jae-Jin Kim, Soon Eon Bae
  • Patent number: 8852624
    Abstract: A biomedical implant according to this invention comprises ceramic complex, which includes a surface-modified basic ceramic particles, which are basic ceramic particles modified their surface with first biodegradable polymers, and the second biodegradable polymers. The first and second biodegradable polymer are combined each other and form a stereo complex. The biomedical implant has a superior effect to suppress inflammation caused by degradation of biodegradable polymers with improving its mechanical property.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: October 7, 2014
    Assignee: Korea Institute of Science and Technology
    Inventors: Dong Keun Han, Yoon Ki Joung, Jong Hee Kang, Ji Yeon Choi, Chang Hun Kum
  • Patent number: 8734911
    Abstract: Disclosed is nanocoupling of a polymer onto a surface of a metal substrate for improving coating adhesion of the polymer on the metal substrate, and in vivo stability and durability of the polymer. In accordance with the present invention, the polymers can be grafted via a chemical bonding on the surface of the metal substrate by the nanocoupling, by which adhesion, biocompatibility and durability of a polymer-coated layer which is to be formed later on the metal substrate were remarkably improved; therefore, the nanocoupling according to the present invention can be applied to surface modification of a metal implant, such as stents, mechanical valves, and an articular, a spinal, a dental and an orthopedic implants.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: May 27, 2014
    Assignee: Korea Institute of Science and Technology
    Inventors: Dong Keun Han, Kwi Deok Park, Jae-Jin Kim, Chul Ho Park, Seong Bae Cho
  • Publication number: 20130280335
    Abstract: A biomedical implant according to this invention comprises ceramic complex, which includes a surface-modified basic ceramic particles, which are basic ceramic particles modified their surface with first biodegradable polymers, and the second biodegradable polymers. The first and second biodegradable polymer are combined each other and form a stereo complex. The biomedical implant has a superior effect to suppress inflammation caused by degradation of biodegradable polymers with improving its mechanical property.
    Type: Application
    Filed: October 2, 2012
    Publication date: October 24, 2013
    Applicant: Korea Institute of Science and Technology
    Inventors: Dong Keun HAN, Yoon Ki JOUNG, Jong Hee KANG, Ji Yeon CHOI, Chang Hun KUM
  • Publication number: 20130189340
    Abstract: A donor capable of controlled release of nitric monoxide and a prosthetic implant whose surface is coated with this donor are disclosed. The donor comprises a main chain of an organic polymer and a side chain that is covalently linked to the main chain and has a diazeniumdiolate functional group. The donor for controlled release of nitric monoxide exists in a fluid state such as liquid at room temperature and undergoes a sol-to-gel phase transition at a physiological pH as the temperature increases above the critical temperature. The critical temperature of the phase transition is in the range of 25 to 35° C., and the gel is a hydrogel without chemical cross-links.
    Type: Application
    Filed: October 4, 2011
    Publication date: July 25, 2013
    Inventors: Won Jong Kim, Yanggy Lee, Kwideok Park, Jihoon Kim, Dong Keun Han
  • Publication number: 20130101635
    Abstract: Methods of preparing a self-assembled matrix from cell-derived extracellular matrice, and of inducing cell proliferation and differentiation by using the self-assembled matrix, and applying the self-assembled matrix into cell therapy. In detail, unique extracellular matrices obtained from particular cells are collected and then subjected to decellularization in order to form a self-assembled matrix including nano fibers only formed of extracellular matrix. In addition, the matrix prepared as described above provides a platform that is effective for the induction of the mass proliferation or differentiation of cells, and thus, may be applied in manufacturing cell therapy products.
    Type: Application
    Filed: October 12, 2012
    Publication date: April 25, 2013
    Applicant: Korea Institute of Science and Technology
    Inventors: Kwideok PARK, Soon Eon BAE, Dong Keun HAN
  • Patent number: 8273880
    Abstract: Disclosed herein are novel pyrazole compounds, pharmaceutically acceptable salts thereof, a method for preparing the same, and uses thereof as anticancer agents.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: September 25, 2012
    Assignee: Korea Institute of Science and Technology
    Inventors: So Ha Lee, Kyung Ho Yoo, Chang Hyun Oh, Dong Keun Han, Ibrahim Mustafa El-Deeb, Byung Sun Park, Su Jin Jung
  • Patent number: 8192655
    Abstract: The present invention relates to covered porous biodegradable polymer microspheres for sustained-release drug delivery and tissue regeneration which has an interconnected inner open pore structure having a wide surface area and high porosity and an outer closed pore structure in which the surface of the microsphere is covered with a thin layer of a biodegradable polymer, and thereby the pores formed on the surface and exposed to the outside are closed; and methods for preparing the same. Due to such a characteristic pore structure, the covered porous biodegradable polymer microspheres according to the present invention can prevent the biologically active material from being excessively released in the early stage immediately after administration, and after that, can gradually release the biologically active material through the interconnected inner pore structure over a prolonged period as the biodegradable polymer thin layer is degraded.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: June 5, 2012
    Assignee: Korea Institute of Science and Technology
    Inventors: Dong Keun Han, Kwideok Park, Jae-Jin Kim, Jun Sik Son, Soon Eon Bae