US Patent Issued to NHK SPRING on Oct. 6 for "Laser welding apparatus and laser welding method" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,752,370, issued on Oct. 6, was assigned to NHK SPRING Co. LTD. (Kanagawa, Japan).

"Laser welding apparatus and laser welding method" was invented by Asato Yamamoto (Yokohama, Japan) and Tadashi Tokiwa (Yokohama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A laser welding apparatus includes a laser medium, an excitation light source and a control unit. The control unit supplies drive power to the excitation light source to inject excitation energy to the laser medium. The control unit supplies preliminary excitation power, which is smaller than pulsed drive power, to the excitation light source over a preliminary supply time, which is longer than...