ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,475, issued on June 3.

"Bulb structure" was invented by Xiaoyan Hu (Yangjiang, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A bulb structure is provided. The bulb structure includes: a bulb body, a wick, a support, a negative cover, a positive base, and a positive cover; the wick is provided with a positive wire and a negative wire; the support is connected to a top of the bulb body; the negative cover is connected to the bulb body; the positive base is connected to the negative cover; the positive cover is connected to the positive base; the wick is located in the bulb body, and the positive wire extends upwards out of the support and the ne...