ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,459,159, issued on Nov. 4, was assigned to Panasonic Intellectual Property Management Co. Ltd. (Osaka, Japan).
"Method for producing colored wood" was invented by Kenji Mori (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a method for producing colored wood, the method including: a step of impregnating a block of wood with an organic acid aqueous solution containing an organic acid; and a step of performing steam treatment at high temperature and high pressure on the block of wood in a wet state of being impregnated with the organic acid aqueous solution while keeping the block of wood in the wet state. In the steam treatment, th...