Artwork Systems Group to Investigate Assertions of Patent Infringement by Markzware

GENT, BELGIUM— May 22, 2007—Artwork Systems Group N.V. (EURONEXT: ARTS), a world leader in professional pre-press software, is investigating claims made by Markzware in a lawsuit filed in the federal district court in Santa Ana, California, that Enfocus products allegedly infringe Markzware’s U.S. patent.