Patents by Inventor Wen-sqn Chen

Wen-sqn Chen 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).

  • Patent number: 5530981
    Abstract: A toothbrush having a scraper disposed therein includes a handle and a bristle portion which has a barrel connected therewith and is pivotally engaged to the handle with a cylinder disposed to the barrel pivotally engaged between two ears extending from an end of the handle, the handle having a groove defined in a side thereof for the scraper to be inserted therein, each of the ears having a first recess defined therein and the cylinder having a plurality of short grooves defined in both ends thereof, the scraper having a first end and having two parts extending therefrom for insertion into said short grooves, a hook portion formed to one of the parts laterally and engaged with the first recess of the ear, the scraper having a T-shaped plate slidably received in the groove of the handle.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: July 2, 1996
    Inventor: Wen-sqn Chen