ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,532,994, issued on Jan. 27, was assigned to Ningbo Shijia Cleaning Tools Co. Ltd (Ningbo, China).
"Cleaning brush and kit thereof" was invented by Siwen Wang (Zhejiang, China), Yongdong Wang (Zhejiang, China) and Hui Hu (Zhejiang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cleaning brush includes a brush handle, a brush head connected to the brush handle, and a plurality of bristles attached to the surface of the brush head, the cross section of the bristles in at least some areas on the surface of the brush head is polygonal; a cleaning brush kit includes the cleaning brush and a storage box corresponding to the cleaning brush; a side wall ...