ALEXANDRIA, Va., May 26 -- United States Patent no. 12,636,535, issued on May 26.
"Fitness bar" was invented by Wei Chen (Zhejiang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fitness bar that is formed by a bar body and a handle. The bar body is a continuous helical spring including a vibrating portion, a transition portion, and a connecting portion. Both the vibrating portion and the connecting portion are shaped like a cylindrical helical spring, and the transition portion is shaped like a conical helical spring that tapers from the vibrating portion to the connecting portion. The handle is fixedly connected to the connecting portion. The connecting portion has a reduced diameter compared with ...