Patents by Inventor Guo M. Guo

Guo M. Guo 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).

  • Electric welding machine
    Patent number: 5618455
    Abstract: An electric welding machine consisting of a high-power resistor, a power transformer, and an inductor, wherein the high-power resistor is controlled to change the constant voltage of the power transformer so that the end voltage and end electric current of the electric welding machine provide a negative resistance characteristic for keeping the electric arc stable.
    Type: Grant
    Filed: July 28, 1995
    Date of Patent: April 8, 1997
    Inventor: Guo M. Guo