According to Qixinbao, Hengtai Lighting (873339), a listed company on the Beijing Stock Exchange, has added new patent information. The patent holder is Hengtai Lighting and the inventor is Song Qi. The patent authorization date is November 22, 2024, and the patent name is "Variable Beam Angle Mining Lamp". The patent type is a Chinese utility model patent, and the patent application number is CN202420039398.9.