ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,539,527, issued on Feb. 3, was assigned to YAZAKI Corp. (Tokyo).
"Horn and ultrasonic joiner" was invented by Yasunori Nabeta (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A horn has knurl-shaped protrusions and recesses that are formed of a plurality of protrusions, and are formed on a first end surface. Among the plurality of protrusions, at least a pair of protrusions arranged symmetrically at both outermost ends in a direction along a vibration direction are asymmetrical surface protrusions. In each of the asymmetrical surface protrusions, an angle value of an outer inclination angle is smaller than an angle value of an inner inclin...