Patents by Inventor Joo Ri Choi

Joo Ri Choi 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).

  • Electron-motion toothbrush
    Patent number: 7222382
    Abstract: An electro-motion toothbrush includes a case containing a driving unit. First and second toothbrush support rods are flexible and rotated by the driving unit in directions opposite to each other. First and second toothbrush heads are connected to upper ends of the first and second toothbrush support rods, respectively. First and second toothbrush bristles are implanted along a lengthwise direction of the first and second toothbrush heads, interweave with each other, and not to cross each other during operation.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: May 29, 2007
    Inventors: Joo A Choi, Joo Ri Choi
  • Electron-motion toothbrush
    Publication number: 20040168270
    Abstract: An electro-motion toothbrush includes a case where a driving unit is installed. First and second toothbrush support rods are flexible and rotated by the driving unit in directions opposite to each other. First and second toothbrush heads are connected to upper ends of the first and second toothbrush support rods, respectively. First and second toothbrush bristles are implanted to interweave with each other along a lengthwise direction of the first and second toothbrush heads and not to cross each other during operation.
    Type: Application
    Filed: January 15, 2004
    Publication date: September 2, 2004
    Inventors: Joo A. Choi, Joo Ri Choi