ALEXANDRIA, Va., Feb. 12 -- United States Patent no. 12,219,929, issued on Feb. 11, was assigned to PET GRAVITY (HANGZHOU) TECHNOLOGY Co. LTD (Hangzhou, China).
"Rollable ball toy" was invented by Lijun Wang (Hangzhou, China) and Xianfu Cao (Hangzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A rollable ball toy is provided, which includes a rollable ball shell, a driving component, and a support connector; the support connector can be deformed and fastened on two sides of a ball center of the rollable ball shell; the driving component is provided in the rollable ball shell. A driving device has only one driving output end, and the other end is provided with the shaft cavity configured to install ...