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how LogoTournament works How LogoTournament works Contest Entries by offbeatdesign Return to Contest Return to Contest Withdrawn New #87 Withdrawn New #86 Withdrawn New #88 Discussion No comments yet.