Patents by Inventor Mei Chun Kwong

Mei Chun Kwong 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).

  • Publication number: 20050011022
    Abstract: A brushing attachment for an electric toothbrush has a neck extending in a longitudinal direction of the brushing attachment, a head at a remote end of the neck, a driveshaft extending in a longitudinal direction of the neck and having a rotation axis extending in the longitudinal direction. There is tuft block mounted to the head for oscillation about a pivot axis extending substantially normally to the rotation axis of the driveshaft. A cam is attached to or formed integrally with the driveshaft and provides a cam surface surrounding the longitudinal axis and being of varied displacement in the longitudinal direction. A cam follower is associated mechanically with the tuft block and bears against the cam surface to effect pivotal oscillation of the tuft block about the pivot axis in use.
    Type: Application
    Filed: July 17, 2003
    Publication date: January 20, 2005
    Inventor: Mei Chun Kwong