Patents by Inventor Kuo-Shen Chen

Kuo-Shen 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: 6105191
    Abstract: A toothbrush with scraping bristles has a plural number of bristle clusters crisscrossly mounted on a block head. The tip of the bristle clusters has a contour mating with dental area. In the block head, there are provided with a scraping bristle stem which has a plural number of movable scraping bristles normally extendable out of the block head for moving to and fro in the gingiva sulcus to scrape off tartars formed on teeth surface. A plural number of spaced and triangle scraping flakes may be disposed on each scraping bristle to enhance the effect of scraping tartars and dental plaque formed in the inter-gingiva-sulcus. The toothbrush may be used manually or be driven electrically.
    Type: Grant
    Filed: October 19, 1998
    Date of Patent: August 22, 2000
    Inventors: Kuo-Shen Chen, Tsehua Chen