April 11, 2008   CHONGKUNDANG CORP: Wins Patent for Gastric-Retentive Drug Chongkundang Corp. has obtained a drug patent on April 8, 2008, Reuters reports.  According to the report, the patent covers gastric-retentive controlled release mono-matrix tablet. Chongkundang Pharmaceutical Corporation -- http://www.ckdpharm.com/ -- manufactures and distributes pharmaceutical products.  The company produces medical drugs in the fields of systemic anti-infective, cardiovascular system, alimentary tract, metabolism, and sensory organs.  Chongkundang Pharmaceutical also constructs apartments and factories. Korea Investors Service gave Chong Kun Dang's senior unsecured debt a BB+ rating, while its commercial paper merited a B rating.
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