Patents by Inventor Chi Ho Choi

Chi 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).

  • Patent number: 11975296
    Abstract: A pore-filled ion exchange polyelectrolyte composite membrane from which the surface ion exchange polyelectrolyte has been removed and a method of manufacturing the same are provided. The ion exchange polyelectrolyte composite membrane exhibits low film resistance and low in-plane-direction swelling degree, and has a smaller film-thickness than a commercial film, and thus, can be used for various purposes. In addition, since the pore-filled ion exchange polyelectrolyte composite membrane is continuously manufactured through a roll-to-roll process, the manufacturing process is simple, and manufacturing costs can be greatly reduced.
    Type: Grant
    Filed: April 29, 2019
    Date of Patent: May 7, 2024
    Assignee: Toray Advanced Materials Korea Inc.
    Inventors: Young Woo Choi, Mi Soon Lee, Tae Young Kim, Young Gi Yoon, Beom Jun Kim, Min Ho Seo, Chi Young Jung, Jong Min Lee, Nam-jo Jeong, Seung Cheol Yang, Ji Yeon Choi
  • Publication number: 20240084259
    Abstract: The present invention relates to stem cell-derived mature cardiomyocytes and a cardiovascular disease model using same and, more specifically, to differentiation into mature ventricular cardiomyocytes by culturing stem cells in a medium containing FGF4 and ascorbic acid, and use of the differentiated mature ventricular cardiomyocytes as a cardiovascular disease cell model. The mature ventricular cardiomyocytes, obtained by culturing stem cells in a medium containing FGF4 and ascorbic acid and inducing the differentiation thereof, and cardiovascular disease cell model using same according to the present invention are very useful for screening for cardiovascular disease therapeutic agents and evaluation of the toxicity of new drugs.
    Type: Application
    Filed: November 13, 2019
    Publication date: March 14, 2024
    Applicant: KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION
    Inventors: Do-Sun LIM, Seung Cheol CHOI, Hyung Joon JOO, Jong-Ho KIM, Chi-Yeon PARK, Yongdoo PARK
  • Publication number: 20240069561
    Abstract: A robotic garden tool includes at least one sensor configured to generate signals associated with an object within an operating area. A first electronic processor of the robotic garden tool receives, from the at least one sensor, an obstacle signal associated with an obstacle located within the operating area. The first electronic processor determines a first location of the robotic garden tool at a time corresponding to when the first electronic processor received the obstacle signal. The first electronic processor determines a second location of the obstacle based on the obstacle signal and the first location of the garden tool. The first electronic processor generates mapping information of the operating area that includes a virtual boundary based on the second location of the obstacle. The first electronic processor controls the robotic garden tool in the operating area to remain outside of the virtual boundary based on the mapping information.
    Type: Application
    Filed: August 15, 2023
    Publication date: February 29, 2024
    Inventors: Hei Man Lee, Hok Sum Sam Lai, Man Ho Choi, Ho Lam Ng, Shing Hin Li, Chi Chau Lee, Tat Hei Lai
  • Patent number: 11007136
    Abstract: The present invention relates to a cosmetic composition for wrinkle reduction comprising, as an active ingredient, a Gynostemma pentaphyllum gypenoside fraction and, more specifically, to a cosmetic composition for wrinkle reduction, wherein the Gynostemma pentaphyllum gypenoside fraction includes at least one gypenoside selected from the group consisting of gypenoside UL1, gypenoside UL2, gypenoside UL3, gypenoside UL4, gypenoside UL5, gypenoside UL6, and gypenoside UL7.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: May 18, 2021
    Assignee: CELLTRION, INC.
    Inventors: Young Jun Park, Kee Won Yu, Jae Hun Kim, Yeon Sook Kim, Seung Ki Lee, Joo Hyuck Lim, Jong Mook Kim, Chi Ho Choi, Ju Yeon Kim, Jung Yun Kim, Sung Ho Moon
  • Publication number: 20200390842
    Abstract: The present invention relates to a composition comprising natural plant extracts for alleviating inflammation caused by yellow dust and fine particulate, wherein the plant extracts of the present invention inhibit a production of NO caused by the yellow dust and fine particulate and a production of inflammatory cytokines, thus having an excellent effect on preventing or alleviating skin inflammation caused by the yellow dust, fine particulate and other harmful substances.
    Type: Application
    Filed: June 19, 2020
    Publication date: December 17, 2020
    Inventors: Jae Hun Kim, Seung Ki Lee, Joo Hyuck Lim, Yeon Sook Kim, Won Kang Moon, Chi Ho Choi, Kwang Jun Yoon, Sung Ho Moon, Sung Hyun Lee, Myeong Hun Yeom, Soo Mi Ahn, Kyoung Wook Kim, Mi Kyung Sung, Young Pyo Jang, Jinju Kim
  • Publication number: 20190110980
    Abstract: The present invention relates to a cosmetic composition for wrinkle reduction comprising, as an active ingredient, a Gynostemma pentaphyllum gypenoside fraction and, more specifically, to a cosmetic composition for wrinkle reduction, wherein the Gynostemma pentaphyllum gypenoside fraction includes at least one gypenoside selected from the group consisting of gypenoside UL1, gypenoside UL2, gypenoside UL3, gypenoside UL4, gypenoside UL5, gypenoside UL6, and gypenoside UL7.
    Type: Application
    Filed: June 10, 2016
    Publication date: April 18, 2019
    Inventors: Young Jun Park, Kee Won Yu, Jae Hun Kim, Yeon Sook Kim, Seung Ki Lee, Joo Hyuck Lim, Jong Mook Kim, Chi Ho Choi, Ju Yeon Kim, Jung Yun Kim, Sung Ho M oon
  • Publication number: 20180207222
    Abstract: The present invention relates to a composition comprising natural plant extracts for alleviating inflammation caused by yellow dust and fine particulate, wherein the plant extracts of the present invention inhibit a production of NO caused by the yellow dust and fine particulate and a production of inflammatory cytokines, thus having an excellent effect on preventing or alleviating skin inflammation caused by the yellow dust, fine particulate and other harmful substances.
    Type: Application
    Filed: September 7, 2016
    Publication date: July 26, 2018
    Inventors: Jae Hun Kim, Seung Ki Lee, Joo Hyuck Lim, Yeon Sook Kim, Won Kang Moon, Chi Ho Choi, Kwang Jun Yoon, Sung Ho Moon, Sung Hyun Lee, Myeong Hun Yeom, Soo Mi Ahn, Kyoung Wook Kim, Mi Kyung Sung, Young Pyo Jang, Jinju Kim
  • Patent number: 9338317
    Abstract: An image forming apparatus includes a user interface unit that includes a scan area, an image reading unit that reads an image of a scan object disposed on the scan area, a driving unit that moves the image reading unit, a control unit that controls a function according to a position of the scan object, an operation performing unit that performs the function by using the read image, and a storage unit that stores information about the function corresponding to the position of the scan object. The scan area includes a determination area and a function area, and when it is determined that the scan object does not exist on the determination area, the control unit controls the operation performing unit to perform the function corresponding to the position of the scan object on the function area.
    Type: Grant
    Filed: September 26, 2013
    Date of Patent: May 10, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chi-ho Choi, Young-kook Park
  • Publication number: 20150222783
    Abstract: A security document with a high level of security fabricated at low cost by using an image forming apparatus-based security document management system is provided. The management system may include a near field communication (NFC) tag reader/writer, a method of managing a security document, a method of creating a security document, a method of certifying a security document, an image forming apparatus, and an image forming apparatus-based security document management system. A method of managing a security document by using an image forming apparatus including an NFC tag reader/writer may include an embodiment reading an integrated NFC tag of security paper including the integrated NFC tag by using the NFC tag reader/writer; performing a security document creation process for the security paper when a first S/N is stored in the NFC tag; and performing a security document certification process for the security document when the first S/N, a key value, and a second S/N are stored in the NFC tag.
    Type: Application
    Filed: October 7, 2014
    Publication date: August 6, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chi Ho CHOI, Chun Sub RYU
  • Publication number: 20140285859
    Abstract: An image forming apparatus includes a user interface unit that includes a scan area, an image reading unit that reads an image of a scan object disposed on the scan area, a driving unit that moves the image reading unit, a control unit that controls a function according to a position of the scan object, an operation performing unit that performs the function by using the read image, and a storage unit that stores information about the function corresponding to the position of the scan object. The scan area includes a determination area and a function area, and when it is determined that the scan object does not exist on the determination area, the control unit controls the operation performing unit to perform the function corresponding to the position of the scan object on the function area.
    Type: Application
    Filed: September 26, 2013
    Publication date: September 25, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chi-ho CHOI, Young-kook Park
  • Publication number: 20080125055
    Abstract: An apparatus and method for controlling a mobile communication terminal based on contact that allows input of various user's contact information through a contact sensor are provided, which includes a contact sensor contact sensor that includes a plurality of contact switches arranged in a grid array and sensing the user's contact to produce contact signals. A contact information generator generates contact information using the contact signals. A controller determines whether the contact information is preset contact information, and executes a command that is set corresponding to the contact information if the contact information is preset contact information, or sets a command to be executed corresponding to the contact information if the contact information is not preset contact information. The grid arrangement of the contact switches allows input of contact information using various methods. Accordingly, a user can directly set or modify a method for inputting a command for controlling a function.
    Type: Application
    Filed: December 22, 2006
    Publication date: May 29, 2008
    Inventors: Chi Ho Choi, Young Choi
  • Publication number: 20080068450
    Abstract: Provided are a method and apparatus for displaying a moving image using a plurality of contrast tones in a mobile communication terminal, which allow effective display of color moving image data. The method includes generating contrast tone moving image data represented by a plurality of contrast tones from color moving image data, wherein the contrast tones vary depending on an ambient brightness; and displaying an moving image using the generated contrast tone moving image data. The method and apparatus enable a moving image to be naturally rendered by making full use of contrast tones even when an input moving image screen is too bright or too dark.
    Type: Application
    Filed: February 12, 2007
    Publication date: March 20, 2008
    Inventor: Chi Ho Choi