Patents by Inventor Changchun Zhu

Changchun Zhu 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).

  • Automatic Pole
    Publication number: 20100033027
    Abstract: An automatic pole includes a mechanical push device and a circuit board device electric-connected with each other. The mechanical push device includes a magnetic inductance device, a contact device, and a housing. The circuit board device comprises a control circuit and an internal cell. The control circuit includes a first optoelectronic coupler and a second optoelectronic coupler electric-connected with each other, and a first transistor which base is connected to the first optoelectronic coupler and a second transistor which base is connected to the second optoelectronic coupler.
    Type: Application
    Filed: August 5, 2006
    Publication date: February 11, 2010
    Inventors: Yeping Fan, Jian Li, Changchun Zhu