ALEXANDRIA, Va., July 30 -- United States Patent no. 12,372,043, issued on July 29, was assigned to YANMAR HOLDINGS Co. LTD. (Osaka, Japan).

"Stirling engine" was invented by Kazuyuki Koda (Osaka, Japan), Masato Kitazaki (Osaka, Japan), Jiro Fukudome (Osaka, Japan), Osamu Sakamoto (Maibara, Japan) and Nobu Kobayashi (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A Stirling engine includes: the thermosiphon that accommodates the heating medium receiving heat from a heat source; and an engine unit that has a body accommodating working gas. A heater that gives heat to the working gas by the heating medium is arranged in the body. The Stirling engine includes an engine controller that executes cont...