WORCESTER, Mass., Dec. 18, 2007 (PRIME NEWSWIRE) -- Generex Biotechnology Corporation (Nasdaq:GNBT) announced today that its wholly owned subsidiary, Antigen Express, Inc., has been awarded a Japanese patent strengthening its proprietary antigen presentation technology platform. The patent, entitled "Regulation of Antigen Presentation", strengthens specific aspects the Antigen Express peptide vaccine and immunomodulation technology.