Northstar Cleanroom ProductsLogo Design Contest Logo Design Contest Contests / Northstar Cleanroom Products Northstar Cleanroom Products has selected their winning logo design. For $375 they received 204 designs from 29 different designers from around the world. Find out how LogoTournament works How LogoTournament works Contest Entries by Mr_Do Return to Contest Return to Contest Withdrawn New #7 Withdrawn New #18 Withdrawn New #17 Withdrawn New #13 Withdrawn New #9 Discussion No comments yet.