ALEXANDRIA, Va., June 6 -- United States Patent no. 12,279,539, issued on April 22.
"Rolling lawn aerator" was invented by Kun Zhang (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application discloses a rolling lawn aerator, including a perforating device, where the perforating device is capable of rolling on a lawn so as to perforate and aerate the lawn. The perforating device includes a body assembly and a plurality of perforating assemblies, and the plurality of perforating assemblies are arranged in a circumferential direction of the body assembly; and each of the perforating assemblies includes a perforating pipe, and at least a part of a structure of the perforating pipe ...