ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,744,400, issued on Sept. 22, was assigned to GUANGDONG GENIAL TECHNOLOGY Co. LTD. (Zhaoqing, China).

"Circuit, method, and oximeter for indicating power supply by applying double-color light-emitting diode" was invented by Chang Shu (Zhaoqing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A circuit, method, and oximeter for indicating a power supply by applying a double-color light-emitting diode (LED) are provided. The circuit, applied to a finger clip type pulse oximeter, comprises the following components: an MCU module, a double-color LED connected to the MCU module, a voltage measurement module connected to the MCU module, a rechargeable ba...