Patents by Inventor Jong S. Koh

Jong S. Koh 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).

  • Irreversible HIV protease inhibitors, intermediates, compositions and processes for the preparation thereof
    Patent number: 5587388
    Abstract: The present invention provides cis-epoxide compounds represented by formula (I-1), (I-2) or (I-3) which are useful for treating or preventing diseases caused by HIV infection: ##STR1## wherein: A, B, D, E, R.sup.1, R.sup.10, R.sup.11, K, G, Q, r and J have the meanings as defined in the specification.
    Type: Grant
    Filed: November 30, 1993
    Date of Patent: December 24, 1996
    Assignee: Lucky Limited
    Inventors: Sung C. Kim, Nakyen Choy, Chang S. Lee, Young C. Son, Ho I. Choi, Jong S. Koh, Heungsik Yoon, Chi H. Park, Sang S. Kim
  • Symmetrical image block scanning method for reducing block effect
    Patent number: 4951157
    Abstract: A scanning method for reducing block boundary effects in vector quantisation image coding by changing the scanning order to symmetrical ordering is disclosed. The method is based on a very simple symmetrical ordering between adjacent block boundaries and is applicable not only to two-dimensions but also to three-dimensions. The scanning of the invention is performed by dividing two-dimensional image into a number of small image blocks, thereafter the small image blocks are scanned as one-dimensional vector. The scanning order of each small image block arranged in the whole image is changed symmetrically in the directions of longitudinal and transversal axes so that the starting and ending points of image block may be identical.
    Type: Grant
    Filed: July 26, 1988
    Date of Patent: August 21, 1990
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Jong S. Koh, Jae K. Kim