ALEXANDRIA, Va., May 5 -- United States Patent no. 12,616,188, issued on May 5.
"Squirrel-proof device" was invented by Rui Zhang (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present utility model relates to a squirrel-proof device set on a supporting rod, comprising housing and connecting parts set between the housing and the supporting rod; wherein the connecting parts enable the housing to move upward along the supporting rod when the housing is exerted a downward force; the first housing is arranged above the second housing, the first and/or the second housing is connected to the supporting rod through the connecting parts; the second housing comprises an inverted circular table bo...