Patents by Inventor TSUNG-MIN TSAI

TSUNG-MIN TSAI 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: 20220283449
    Abstract: Disclosed is a contact lens comprising an optical region including a first area, a second area and a third area, concentrically arranged in such order from a lens center. The first area includes a correction zone having a nearsightedness correcting power. The second and third areas each include at least two defocusing zones and at least one correction zone, wherein the at least two defocusing zones and the at least one correction zone are alternatively arranged. The second area has a first power difference of ?2.00 to ?5.00 D, the third area has a second power difference of ?3.00 to ?10.00 D, and the second power difference is equal to or more negative than the first power difference.
    Type: Application
    Filed: March 2, 2022
    Publication date: September 8, 2022
    Inventors: TSUNG-MIN TSAI, CHIEH-KAI WANG, CHIEN-HSIU CHEN