US Patent Issued to MITSUBISHI PENCIL on Oct. 6 for "Writing instrument" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,752,569, issued on Oct. 6, was assigned to MITSUBISHI PENCIL COMPANY Ltd. (Tokyo).

"Writing instrument" was invented by Yoshiharu Namiki (Tokyo) and Makoto Tamura (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A click-action writing instrument 1 comprises a rear shaft 20, an inner cylinder 30 having on a side surface thereof an elastic deformation portion 37 that can elastically deform radially outward and inward, and a rotor 40. The elastic deformation portion has a first protrusion 38 on the outer surface thereof. The elastic deformation portion has a second protrusion 39 on the inner surface thereof. The first protrusion 38 is configured to cau...