CHUNG-YANG TSAI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: An improved shoelace has an elastic inner core having a plurality of elastic members and a woven string covering the elastic inner layer. The woven string has a plurality of narrow sections and wide sections evenly disposed on two ends of the elastic inner core. Each narrow section wraps around the elastic inner core, each wide section is longer than each narrow section and separated from the elastic inner core. When the elastic inner core is not pulled, the wide sections overlap and fold onto the elastic inner core 10 and has a cone shape with at least three times thickness than the narrow section. When the elastic inner core is pulled, the wide sections are stretched straight.
Abstract: An improved shoelace has an elastic inner core having a plurality of elastic members and a woven string covering the elastic inner layer. The woven string has a plurality of narrow sections and wide sections evenly disposed on two ends of the elastic inner core. Each narrow section wraps around the elastic inner core, each wide section is longer than each narrow section and separated from the elastic inner core. When the elastic inner core is not pulled, the wide sections overlap and fold onto the elastic inner core 10 and has a cone shape with at least three times thickness than the narrow section. When the elastic inner core is pulled, the wide sections are stretched straight.
© 2025 Justia
