ALEXANDRIA, Va., July 28 -- United States Patent no. 12,693,608, issued on July 28, was assigned to DOWA ELECTRONICS MATERIALS Co. LTD. (Tokyo) and DOWA IP CREATION Co. LTD. (Okayama, Japan).

"Carrier core material, and electrophotographic development carrier and electrophotographic developer using same" was invented by Yuto Kamai (Okayama, Japan), Shinya Sasaki (Okayama, Japan) and Yuki Kaneshiro (Okayama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A carrier core material has a volume moment mean D [4, 3] of O. Bluntness measured with an injection type image analysis particle size distribution meter is equal to or greater than 65% and equal to or less than 80%, and the volume moment mean D [4, 3] ...