ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,036, issued on May 20, was assigned to KABO TOOL COMPANY (Taichung, Taiwan).
"Sleeve structure and working tool assembly" was invented by Chih-Ching Hsieh (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A sleeve structure includes a sleeve body, a tooth structure, a stopping structure, an elastic component and a resisting component. The sleeve body includes an opening hole. The tooth structure is disposed around an inner wall of the sleeve body, and includes a first groove and a second groove. The first groove and the second groove are disposed around the tooth structure, and the first groove is closer to the opening hole than the s...