Patents by Inventor Do-kwan Lee

Do-kwan Lee 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).

  • Charging roller for image forming apparatus and manufacturing method thereof
    Patent number: 8412074
    Abstract: Disclosed is a charging roller for an image forming apparatus capable of preventing the formations of surface scratches. The charging roller includes a roller shaft, a roller body formed on the roller shaft and a scratch prevention layer formed on the roller body. The scratch prevention layer contains inorganic crystal of polysilicate.
    Type: Grant
    Filed: July 7, 2010
    Date of Patent: April 2, 2013
    Assignee: Samsung Electronics Co., Ltd
    Inventors: Young-sub Shin, Jong-moon Eun, Hee-won Jung, Do-kwan Lee
  • CHARGING ROLLER FOR IMAGE FORMING APPARATUS AND MANUFACTURING METHOD THEREOF
    Publication number: 20110129258
    Abstract: Disclosed is a charging roller for an image forming apparatus capable of preventing the formations of surface scratches. The charging roller includes a roller shaft, a roller body formed on the roller shaft and a scratch prevention layer formed on the roller body. The scratch prevention layer contains inorganic crystal of polysilicate.
    Type: Application
    Filed: July 7, 2010
    Publication date: June 2, 2011
    Applicant: Samsung Electronics Co., Ltd
    Inventors: Young-sub SHIN, Jong-moon Eun, Hee-won Jung, Do-kwan Lee