Patents by Inventor Chuo Ann Ling

Chuo Ann Ling 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).

  • GEMSTONE TESTING DEVICE
    Publication number: 20240337601
    Abstract: The application provides an improved gemstone testing device for testing a gemstone specimen. The device includes a housing, a platform for supporting the gemstone, a first light source for illuminating the gemstone, a second light source for exciting the gemstone, a third light source for exciting the gemstone, a light filter, a sheet of light absorptive material for absorbing blue light ray, a camera module for taking a picture of the gemstone, and a display module for displaying the picture and a corresponding reference picture of the gemstone to a user.
    Type: Application
    Filed: August 27, 2021
    Publication date: October 10, 2024
    Applicant: Jubilee Diamond Instrument (s) Pte. Ltd.
    Inventors: Kui Lim Tam, Chuo Ann Ling