Rivets are used to strengthen certain weak points in denim jeans. Proposed by Jacob W. Davis, a Latvian-born American tailor who is credited with inventing the modern jeans, Levi Strauss led a patent for a denim work trouser reinforced with copper rivets. The patent focused on the use of rivets to improve the fastening pocket openings and make sure sewed seams would not rip by placing a metal rivet or eyelet at each end of the pocket-opening. Nowadays rivets are also used for decoration purposes as well.