ALEXANDRIA, Va., June 9 -- United States Patent no. 12,285,531, issued on April 29, was assigned to Zhende Medical Co. Ltd. (Shaoxing, China).

"Wound covering and preparation method thereof" was invented by Rui Zhang (Shaoxing, China), Jianguo Lu (Shaoxing, China), Luping Zhao (Shaoxing, China) and Yu Gong (Shaoxing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a wound covering with prominent biocompatible and accelerated wound-healing and its preparation method thereof. The wound covering comprises a film prepared from collagen and Dopa-containing protein-mussel adhesive protein, which is immobilized on collagen by chemical cross-linking, thus enhances the stability ...