ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,538,966, issued on Feb. 3, was assigned to Linhai Guokang Leisure Products Co. Ltd (Zhejiang, China).
"Sun umbrella locking device" was invented by Defu Liu (Zhejiang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A sun umbrella locking device includes: a sliding base, a locking clamping base and a fastening assembly, wherein a sliding chamber is formed in the locking clamping base, and two locking pieces are arranged on side surfaces of the locking clamping base; an expansion joint is formed between the two locking pieces, and the expansion joint extends into the sliding chamber of the locking clamping base; the two locking pieces are respectivel...