Piezo Device TechnologiesLogo Design Contest Logo Design Contest Contests / Piezo Device Technologies Piezo Device Technologies has selected their winning logo design. For $300 they received 120 designs from 25 different designers from around the world. Find out how LogoTournament works How LogoTournament works Contest Entries by grafixsphere Return to Contest Return to Contest Withdrawn New #69 Withdrawn New #1 Discussion No comments yet.