Patents by Inventor Cheng-Chang Wang

Cheng-Chang Wang 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).

  • Publication number: 20080008517
    Abstract: An improvement of ink-pen is disclosed. The improvement of ink-pen comprises a seal-up element. The seal-up element can protect the lead of the ink-pen effectively and avoid consuming the ink unnecessarily with losing the cover of the ink-pen to extend the lifetime of the improvement of ink-pen.
    Type: Application
    Filed: July 5, 2006
    Publication date: January 10, 2008
    Applicant: TA SHIN PRECISION IND. CO., LTD.
    Inventors: Cheng-Chang Wang, Pai-Hsien Wu