ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,495,893, issued on Dec. 16, was assigned to PROJECT NOAH INC. (Seoul, South Korea).
"Method for manufacturing bamboo toothbrush and bamboo toothbrush produced thereby" was invented by Kyungtae Lee (Seoul, South Korea), Hyunseok Jung (Seoul, South Korea) and Hyunsik Choi (Seoul, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A bamboo toothbrush manufacturing method may include an operation of preparing raw materials, which selecting some of the raw materials as materials suitable for manufacturing bamboo toothbrushes on the basis of a vascular bundle ratio on the cross-section of each of the raw materials; a milling operation of processing th...