ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,490,375, issued on Dec. 2, was assigned to Sumitomo Electric Industries Ltd. (Osaka, Japan).
"Printed wiring board" was invented by Kenji Takahashi (Osaka, Japan), Shoichiro Sakai (Osaka, Japan) and Kou Noguchi (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A printed wiring board includes: a base film having a main surface; a wiring disposed on the main surface; a first plating lead connected to a first position of the wiring; and a second plating lead connected to a second position of the wiring. A cross sectional area of the wiring at a third position of the wiring is 95% or more of a cross sectional area of the wiring at the first positi...