US Patent Issued to NHK SPRING on May 6 for "Golf shaft" (Japanese Inventors)

ALEXANDRIA, Va., June 10 -- United States Patent no. 12,290,726, issued on May 6, was assigned to NHK SPRING Co. LTD. (Yokohama, Japan).

"Golf shaft" was invented by Kosuke Fujiwara (Yokohama, Japan) and Akihisa Inoue (Yokohama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a golf shaft, capable of ensuring bending rigidity required for a golf club and providing good hit feeling in a composite shaft with 50 g-130 g. The golf shaft comprises an element tube made of metal, an outer layer made of a fiber reinforced plastic and covering an outer periphery of the element tube over an entire length of the element tube in an axial direction, an adhesive layer interposed between the element tube a...