Signal I/O Inc.Logo Design Contest Logo Design Contest Contests / Signal I/O Inc. Signal I/O Inc. has selected their winning logo design. For $375 they received 89 designs from 24 different designers from around the world. Find out how LogoTournament works How LogoTournament works Contest Entries by EnzoBluebird Return to Contest Return to Contest Withdrawn New #42 Withdrawn New #41 Discussion No comments yet.