ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,470,306, issued on Nov. 11, was assigned to NTT Inc. (Tokyo).

"Optical power supply system, sleep control method and power receiving optical communication apparatus" was invented by Ryo Miyatake (Musashino, Japan), Hiroaki Katsurai (Musashino, Japan) and Tomoaki Yoshida (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical power supply system, comprising: a power supply optical communication device that supplies power using an optical signal for power supply; and a power receiving optical communication device that is driven by power obtained from the optical signal for power supply transmitted from the power supply optical communic...