Patents by Inventor Bon-Chul Koo

Bon-Chul Koo 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).

  • Privacy filter
    Patent number: 11656827
    Abstract: A privacy filter includes a base having a shape corresponding to a shape of an adherend and formed in a sheet form, a micro-louver portion stacked on one face of the base, wherein the micro-louver portion has a louver pattern in which a light transmitting layer and an opaque layer are alternately arranged with each other in a repeated manner, a first coating formed on one face of the micro-louver portion, a second coating formed on an opposite face of the base to one face of the base, and a foam pad stacked on one face of the second coating, wherein the foam pad is to be adhered to the adherend, and has a predetermined thickness.
    Type: Grant
    Filed: January 22, 2021
    Date of Patent: May 23, 2023
    Assignee: SEWHA CO., LTD
    Inventor: Bon-Chul Koo
  • PRIVACY FILTER
    Publication number: 20210397395
    Abstract: A privacy filter includes a base having a shape corresponding to a shape of an adherend and formed in a sheet form, a micro-louver portion stacked on one face of the base, wherein the micro-louver portion has a louver pattern in which a light transmitting layer and an opaque layer are alternately arranged with each other in a repeated manner, a first coating formed on one face of the micro-louver portion, a second coating formed on an opposite face of the base to one face of the base, and a foam pad stacked on one face of the second coating, wherein the foam pad is to be adhered to the adherend, and has a predetermined thickness.
    Type: Application
    Filed: January 22, 2021
    Publication date: December 23, 2021
    Inventor: Bon-Chul KOO
  • Apparatus and method for web-phone service in dsl
    Publication number: 20050129002
    Abstract: Apparatus and Method for Web-Phone Service in DSL is provided.
    Type: Application
    Filed: December 30, 2002
    Publication date: June 16, 2005
    Inventor: Bon-Chul Koo
  • Dispersant composition used for preparing aqueous pigmented ink for ink-jet
    Patent number: 6838521
    Abstract: The present invention relates to a new dispersant composition used for preparing ink for ink-jet, which provides long term fluidity at a fine injection nozzle of ink-jet, shows a stable injection amount, and gives no coagulation of pigment particles when ink for ink-jet is applied.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: January 4, 2005
    Assignee: Sejong University
    Inventors: Chun Yoon, Bon-Chul Koo
  • Dispersant composition used for preparing aqueous pigmented ink for ink-jet
    Publication number: 20030051632
    Abstract: The present invention relates to a new dispersant composition used for preparing ink for ink-jet, which provides long term fluidity at a fine injection nozzle of ink-jet, shows a stable injection amount, and gives no coagulation of pigment particles when ink for ink-jet is applied.
    Type: Application
    Filed: July 22, 2002
    Publication date: March 20, 2003
    Applicant: NDM Co., Ltd.
    Inventors: Chun Yoon, Bon-Chul Koo