Proven CleanLogo Design Contest Logo Design Contest Contests / Proven Clean Proven Clean has selected their winning logo design. For $275 they received 511 designs from 70 different designers from around the world. Find out how LogoTournament works How LogoTournament works Contest Annotation Delete We are sorry, but the time to edit this annotation has expired. Save Cancel Entries by mosby Return to Contest Return to Contest Comment Activity Order by Ranking Entry Number Comment Activity To leave a comment please click on the logo. Prefers others. Prefers others. Comment Activity No activity yet.