ALEXANDRIA, Va., May 19 -- United States Patent no. 12,631,320, issued on May 19, was assigned to Sichuan Jamie Charming Technology Co. Ltd. (Nanchong City, China).
"Dual-resistor airtight and waterproof bulb" was invented by Weiming Li (Nanchong City, China), Weiguang Li (Nanchong City, China) and Zhimin Hu (Nanchong City, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Some embodiments of the disclosure relate to the technical field of lamps and disclose dual-resistor airtight and waterproof bulbs. In some examples, the stem structure incudes a waterproof rubber base and a vertical light source plate. The waterproof rubber base includes an upper insertion portion and a lower assembly portion which are...