ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,744,149, issued on Sept. 22, was assigned to NIPPON STEEL Corp. (Tokyo).
"Wound core" was invented by Yusuke Kawamura (Tokyo) and Takahito Mizumura (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "This wound core is a wound core including a wound core main body obtained by laminating a plurality of polygonal annular grain-oriented electrical steel sheets in a side view, and the grain-oriented electrical steel sheet has planar portions and bent portions that are alternately continuous in a longitudinal direction, and in at least one bent portion, the crystal grain size Dpx of the grain-oriented electrical steel sheet is 2 W or less."
The patent wa...