ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,557,208, issued on Feb. 17, was assigned to SUMITOMO ELECTRIC INDUSTRIES LTD. (Osaka, Japan).
"High frequency circuit" was invented by Shun Igarashi (Osaka, Japan), Hiroshi Ueda (Osaka, Japan), Suguru Yamagishi (Osaka, Japan) and Ichiro Kuwayama (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A high frequency circuit includes a first insulating layer; a second insulating layer stacked on the first insulating layer directly or with one or more intermediate layers interposed therebetween; a first ground disposed on a first surface that does not face the second insulating layer among the first surface and a second surface forming two surfaces ...