ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,533,748, issued on Jan. 27, was assigned to DELTA KOGYO Co. LTD. (Hiroshima, Japan).
"Laser welding device and laser welding method" was invented by Yukio Yamamoto (Hiroshima, Japan), Tomohito Tsudo (Hiroshima, Japan), Seiya Takahashi (Hiroshima, Japan) and Chieko Hashizaka (Hiroshima, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A laser welding method includes a laser beam irradiation step of oscillating a laser beam and condensing the laser beam on a welding portion, and a scanning step of scanning a spot of the laser beam. In the execution of laser welding, while oscillating the laser beam, a screw portion having a dot shape in a plan view is...