ALEXANDRIA, Va., June 17 -- United States Patent no. 12,312,371, issued on May 27, was assigned to NAHLS CORPORATION CO., LTD. (Kyoto, Japan) and KYOTO UNIVERSITY (Kyoto, Japan).

"Optically-active 2-amino-phosphonoalkane acid, optically-active 2-amino-phosphonoalkane acid salt, and hydrates of these" was invented by Bunta Watanabe (Kyoto, Japan), Ryuzo Yoshioka (Osaka, Japan) and Hideaki Ishida (Yamaguchi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A novel compound has pharmacological activities comparable to those of Nahlsgen and is storable excellently stably. The compound can be produced by a method according to the present invention for producing an optically active 2-amino-phosphonoalkanoic ac...