ZennValve, LLCLogo Design Contest Logo Design Contest Contests / ZennValve, LLC ZennValve, LLC has selected their winning logo design. For $575 they received 266 designs from 50 different designers from around the world. Find out how LogoTournament works How LogoTournament works Contest Entries by yuzron Return to Contest Return to Contest Withdrawn New #131 Withdrawn New #114 Withdrawn New #154 Withdrawn New #145 Withdrawn New #144 Discussion No comments yet.