Patents by Inventor Jong O. Na

Jong O. Na 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 stepless transmission apparatus and method thereof
    Patent number: 4966575
    Abstract: An apparatus and method for automatic adjustment of the variation ratio for distributing an input rotational force into a low speed power line having high variation ratio, and for combining the two power lines thereby providing an output with stepless variation is disclosed.
    Type: Grant
    Filed: May 5, 1989
    Date of Patent: October 30, 1990
    Inventors: Jun Y. Lim, Jong O. Na