Patents by Inventor Longfei RAO

Longfei RAO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • SELF-SERVICE VENDING DEVICE CONTROL METHOD
    Publication number: 20210264393
    Abstract: A method for controlling a self-service vending device to be safely opened, a server and a self-service vending system are provided.
    Type: Application
    Filed: December 7, 2018
    Publication date: August 26, 2021
    Inventors: Zhenya CHEN, Haijin TAO, Ming HONG, Huijun WANG, Longfei RAO, Yonghui WANG, Chao YIN, Jiang DAI