Patents by Inventor Wan-gu Yeo

Wan-gu Yeo 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: 20020001108
    Abstract: The present invention provides a curved lens having a hologram and a method of fabricating the same. In this method, a chromium-plated metal plate on which a hologram is formed is fixed to a moving plate of an injection mold having a curved cavity, and plastic resin is injected and molded. Thus, the metal plate is stretched or elongated, and simultaneously, the hologram of an elongated metal plate is transferred to the plastic resin. Then, a highly refractive material is deposited on the injected plastic, and the resultant structure is coated with a UV-blocking material. In this way, the curved lens having a hologram is fabricated. The plastic curved lens passes the standard values for sunglass lenses in terms of power and parallelism, and can obtain a distinct hologram image by completely preventing generation of color stripes which is the most serious problem in existing plastic curved lenses.
    Type: Application
    Filed: May 10, 2001
    Publication date: January 3, 2002
    Applicant: WAYTECH CO., LTD
    Inventor: Wan-gu Yeo