Patents by Inventor Roger (Chih-chieh) CHANG

Roger (Chih-chieh) CHANG 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).

  • Liquid-crystal lens
    Patent number: 11473014
    Abstract: A LC lens and a liquid-crystal medium used in said LC lens, wherein the medium contains one or more compounds of each of formulae I and II
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: October 18, 2022
    Assignee: MERCK PATENT GMBH
    Inventors: Arnold (Jer-Wei) Chang, Roger (Chih-chieh) Chang, Ray (Kuang-Ting) Chou
  • LIQUID-CRYSTAL LENS
    Publication number: 20200032142
    Abstract: A LC lens and a liquid-crystal medium used in said LC lens, wherein the medium contains one or more compounds of each of formulae I and II
    Type: Application
    Filed: July 24, 2019
    Publication date: January 30, 2020
    Applicant: MERCK PATENT GMBH
    Inventors: Arnold (Jer-Wei) CHANG, Roger (Chih-chieh) CHANG, Ray (Kuang-Ting) CHOU