ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,534,646, issued on Jan. 27, was assigned to YOSHINO GYPSUM Co. LTD. (Tokyo).

"Felt-based four-side-processing and method for producing said processing material" was invented by Takuji Yamashita (Tokyo), Yusuke Watanabe (Tokyo) and Shun Tsukamoto (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A felt-based four-sides-processing material having a release paper-attached pressure-sensitive adhesive layer is provided. The felt-based four-sides-processing material has a continuous or non-continuous pressure-sensitive adhesive region on any of flat surfaces of a base material in a longitudinal direction of the flat surface and release paper pasted to the...