Patents by Inventor Weizhen Chai

Weizhen 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).

  • Clever frame/clip
    Publication number: 20030090621
    Abstract: For the eyewear products, currently the most popular clip-on of sun glasses is the magnetic clip, which is non-reliable after using a period of time. It's also said the magnetic pieces would cause headache to some people. This invention is try to offer a reliable mechanic structure to the frame/clip to facilitate people who wear glasses.
    Type: Application
    Filed: October 25, 2002
    Publication date: May 15, 2003
    Inventor: Weizhen Chai