TOP AUTO has been an industry leader and global innovator of bracketless wiper blades for at least 20 years and continues to create elite inventions for their blades. Currently, Their frameless windshield wiper blade with H- Shaped wiper string is patented in Germany, China, Taiwan and their U. S. Patent is pending. H- Shaped wiper string design bracketless wiper blade isn't just a style, It is created based on the concept for manufacturing windshield wiper blades that can last and its wiping action is precise.