ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,680, issued on March 25, was assigned to Koki Holdings Co. Ltd. (Tokyo).

"Work machine" was invented by Yen-ting Lee (Ibaraki, Japan), Souki Hoshina (Ibaraki, Japan), Keiki Nakaniwa (Ibaraki, Japan) and Hiroki Kitagawa (Ibaraki, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A nailing machine is a work machine, including: an ejection part to which a fastener is supplied; a striking part, striking the fastener supplied to the ejection part; a magazine part, having one end in a first direction attached to the ejection part, and movably supporting the fastener in the first direction; and a feeder part, supported by the magazine part while being ...