Patents by Inventor Junzhing Li

Junzhing Li 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).

  • Laser reactive dyes for DVD copy protection system
    Patent number: 6952392
    Abstract: A method and system for providing copy-protected optical medium using transient optical state change security materials capable of changing optical state when exposed to a wavelength of about 630 nm to about 660 nm and software code to detect such change in optical state.
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: October 4, 2005
    Assignee: Verification Technologies, Inc.
    Inventors: Rakesh Vig, Scott Gerger, Richard H. Selinfreund, Peter Miller, Junzhing Li, Ewell Cook, Anthony A. Saglimbeni