Patents by Inventor Qinglu MA

Qinglu MA 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).

  • CAPACITIVE LIQUID LEVEL SENSOR
    Publication number: 20230160735
    Abstract: A liquid level sensor having improved performance is disclosed as including a metal cover plate; a conductive pin, the conductive pin penetrating the metal cover plate; a plurality of electrode plates; a plurality of support plates supporting the electrode plates, so that a fixed interval is maintained between the plurality of electrode plates; each electrode plate of the plurality of electrode plates has a wing portion, the wing portion is connected to the conductive pin, and the wing portion extends outward from each electrode plate.
    Type: Application
    Filed: August 27, 2020
    Publication date: May 25, 2023
    Inventors: Wenjie WU, Walter WU, Qinglu MA, HaiJian LIANG