Patents by Inventor Tung-chuan Wang

Tung-chuan Wang 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).

  • Optical storage medium of limiting play times
    Publication number: 20040037208
    Abstract: An optical data storage medium includes a first substrate, the first substrate including a plurality of first data structures; a second substrate positioned above the first substrate, the second substrate including a plurality of second data structures; a reflective layer positioned on the second substrate to cover the second data structures; and a masking layer interposed between the reflective layer and the first substrate to cover the first data structures, the masking layer having a varying reflectivity to thereby render the second data structures unreadable.
    Type: Application
    Filed: October 17, 2002
    Publication date: February 26, 2004
    Inventors: Irene Chen, Tung-Chuan Wang, Jyh-Huei Lay, Tien-Yu Chou