Patents by Inventor Ka-Chow Ip Charles

Ka-Chow Ip Charles 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).

  • RETRACTABLE KEY CHAIN
    Publication number: 20090211321
    Abstract: A lanyard or key chain having a non-coiled body with two connecting ends. The body is made of a resiliently deformable material and is stretchable between extended and retraced states.
    Type: Application
    Filed: February 26, 2008
    Publication date: August 27, 2009
    Inventors: Tak Ko Wong, Ka-Chow Ip Charles