ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,200, issued on March 25, was assigned to Mitsubishi Electric Corp. (Tokyo).

"Heat transfer plate and heat exchange element" was invented by Hajime Sotokawa (Tokyo), Xin Wang (Tokyo), Shunsaburo Okawa (Tokyo) and Satoshi Wakita (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "In a first and second corrugated portions of a first and second heat transfer plates, first front-side convex portions that are convex toward one side in a first direction and first back-side convex portions that are convex toward the opposite side in the first direction are alternately formed along a second direction. In at least one end of both ends of each of the first ...