ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,414,502, issued on Sept. 16, was assigned to Nanjing Chervon Industry Co. Ltd. (Nanjing, China).
"Lawn mower and cutting blade" was invented by Haishen Xu (Nanjing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cutting blade is capable of being driven to rotate around a first axis. The cutting blade includes cutting portions comprising cutting edges for cutting and extension portions closer to the first axis relative to the cutting portions. Each of the extension portions comprises an upper surface and a lower surface, at least part of the upper surface is a part of a side surface of a first cone with the first axis as an axis, and at least pa...