ALEXANDRIA, Va., June 12 -- United States Patent no. 12,295,301, issued on May 13, was assigned to TOYOTA BOSHOKU K.K. (Aichi, Japan) and GREEN TECH & LAB Co. LTD. (Tokyo).

"Plant cultivation method and plant cultivation apparatus" was invented by Yoko Hattori (Aichi, Japan), Kazufumi Tabata (Aichi, Japan) and Hiroshi Suzuki (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A plant cultivation method including irradiating a plant with first irradiation light including blue light and second irradiation light including red light. A first irradiation period T1 during which the first irradiation light is emitted and a second irradiation period T2 during which the second irradiation light is emitted...