Patents by Inventor David C. H. Chai

David C. H. Chai 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).

  • Pilly remover
    Patent number: 5575031
    Abstract: Pillies on the staple fibers of a fabric surface are removed by rubbing a plurality of arcuate blades over the surface of the fabric to guide the pillies into a plurality of double blade defining notches at the uppermost edges of holes formed in the blades.
    Type: Grant
    Filed: August 11, 1995
    Date of Patent: November 19, 1996
    Inventor: David C. H. Chai