Patents by Inventor Joi-Tsang Shum

Joi-Tsang Shum 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).

  • Method for inspecting the water content and oxygen transmissibility of an ophthalmic lens and optical inspecting system for inspecting an ophthalmic lens
    Patent number: 10345236
    Abstract: The present invention provides a method for inspecting the water content and oxygen transmissibility of an ophthalmic lens and an optical inspecting system for inspecting an ophthalmic lens. Through the voltage variation from the measurement of transmitted light the water content and oxygen transmissibility of an ophthalmic lens are obtained. The oxygen transmissibility of the ophthalmic lens which is not under the specific condition specified by the standardized inspecting method can also be obtained.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: July 9, 2019
    Assignee: NATIONAL APPLIED RESEARCH LABORATORIES
    Inventors: Chia-Lien Ma, Hsin-Yi Tsai, Chih-Ning Hsu, Yu-Hsuan Lin, Kuo-Cheng Huang, Joi-Tsang Shum