US Patent Issued to Sumitomo Electric Industries on April 22 for "Copper-coated steel wire, stranded wire, insulated electric wire, and cable" (Japanese Inventors)

ALEXANDRIA, Va., June 6 -- United States Patent no. 12,283,390, issued on April 22, was assigned to Sumitomo Electric Industries Ltd. (Osaka, Japan).

"Copper-coated steel wire, stranded wire, insulated electric wire, and cable" was invented by Takumi Akada (Osaka shi, Japan) and Daigo Sato (Osaka shi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A copper-coated steel wire includes a core wire made of a steel and a coating layer that covers the outer peripheral surface of the core wire and is made of copper or a copper alloy. In a cross section perpendicular to the longitudinal direction of the core wire, the ten-point average roughness Rzjis of the outer peripheral surface of the core wire is 50% or ...