ALEXANDRIA, Va., July 7 -- United States Patent no. 12,677,711, issued on July 7, was assigned to Linhai Qinghui Light Electricity Lamp Co. Ltd. (Taizhou, China).
"Direct plug-in LED lamp bead with internal resistor" was invented by Yongfu Zeng (Loudi, China) and Zhangyou Wu (Taizhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a direct plug-in LED lamp bead with an internal resistor. An LED luminous chip is fixed in a bowl-shaped stand with a special adhesive, a resistor chip is fixed to a flat stand with the adhesive, the LED luminous chip has an electrode electrically connected to the bowl-shaped stand through conductive filaments, as well as an electrode electrically connected to on...