Patents by Inventor Chan S. Park

Chan S. Park 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).

  • Device for mounting a magnetic roller of a developing unit for a copying apparatus
    Patent number: 5153649
    Abstract: A device for mounting a magnetic roller which is disposed in a developing unit of a copying apparatus to apply toner to a drum at a given thickness. The device includes a toner box composed of two separate boxes which are joined to each other by an adhesive tape, and coil springs extending between the boxes. The second box is provided with protruding guide portions for receiving and supporting the magnetic roller therein to prevent an overflow of toner from the toner box.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: October 6, 1992
    Assignee: Gold Star Co., Ltd.
    Inventor: Chan S. Park
  • Fe-Mn alloy plated steel sheet and manufacturing method thereof
    Patent number: 5082748
    Abstract: An Fe-Mn steel sheet plated with an electrodeposited lower layer of Zn or a Zn alloy and as an upper layer at least 0.5 g/mn.sup.2 of an Fe-Mn alloy with a manganese content of no more than 60% by weight, electrodeposited on the lower layer, has improved corrosion resistance.
    Type: Grant
    Filed: December 29, 1989
    Date of Patent: January 21, 1992
    Assignees: Pohang Iron & Steel Co., Ltd., Research Institute of Industrial Science & Technology
    Inventors: Duk S. Ahn, Jae R. Lee, Chan S. Park