Patents by Inventor Duk S. Ahn

Duk S. Ahn 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).

  • 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