Patents by Inventor Young-Hwan Ha

Young-Hwan Ha 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).

  • Quinolizine carboxylic acid derivatives
    Patent number: 6235751
    Abstract: A quinolizine carboxylic acid derivative of formula (I) or a pharmaceutically acceptable salt thereof: wherein R1 and R2 have the same meanings the as defined in the specification.
    Type: Grant
    Filed: February 8, 2000
    Date of Patent: May 22, 2001
    Assignee: Korean Research Institute of Chemical Technology
    Inventors: Tae-Ho Park, Young-Hwan Ha, Do-Yeob Kim