Patents by Inventor Lance Lixin Shen

Lance Lixin Shen 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).

  • Patent number: 8005259
    Abstract: Various improvements and applications for digital watermarking technology are detailed. One concerns techniques for making watermarks resistant to malicious attacks. Another involves using digital watermarking with ID cards and credentials, such as a watermarked driver's license conveying a user's cryptographic PKI. Still another uses digital watermarks in connection with automated compliance audits for corporate users of electronic content. A variety of other technologies are also detailed.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: August 23, 2011
    Assignee: Digimarc Corporation
    Inventors: Kenneth L. Levy, Ravi K. Sharma, Lance Lixin Shen, John Stach
  • Publication number: 20100202653
    Abstract: Various improvements and applications for digital watermarking technology are detailed. One concerns techniques for making watermarks resistant to malicious attacks. Another involves using digital watermarking with ID cards and credentials, such as a watermarked driver's license conveying a user's cryptographic PKI. Still another uses digital watermarks in connection with automated compliance audits for corporate users of electronic content. A variety of other technologies are also detailed.
    Type: Application
    Filed: April 20, 2010
    Publication date: August 12, 2010
    Inventors: Kenneth L. Levy, Ravi K. Sharma, Lance Lixin Shen, John Stach
  • Patent number: 7702125
    Abstract: Various improvements and applications for digital watermarking technology are detailed. One concerns techniques for making watermarks resistant to malicious attacks. Another involves using digital watermarking with ID cards and credentials, such as a watermarked driver's license conveying a user's cryptographic PKI. Still another uses digital watermarks in connection with automated compliance audits for corporate users of electronic content. A variety of other technologies are also detailed.
    Type: Grant
    Filed: February 5, 2004
    Date of Patent: April 20, 2010
    Assignee: Digimarc Corporation
    Inventors: Kenneth L. Levy, Ravi K. Sharma, Lance Lixin Shen, John Stach
  • Patent number: 7684623
    Abstract: The disclosure describes pattern recognition detectors and software used to detect patterns in image streams. The detectors operate on streams of image data, making them suitable for detecting certain types of patterns in documents and images passed between processes and devices. For instance, the streaming mode detectors operate in printer drivers on streams of image data being passed to a printer. Also, the streaming mode detectors operate in scanner drivers on streams of image data being passed from a scanner. The disclosure describes pattern detectors for shapes with complex features as well as objects comprised of many smaller shapes. The disclosure also describes novel raster line and edge tracing pattern techniques.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: March 23, 2010
    Assignee: Digimarc Corporation
    Inventors: Lance Lixin Shen, Stephen K. Decker, Clayton L. Davidson
  • Patent number: 7151854
    Abstract: The disclosure describes pattern recognition detectors and software used to detect objects in image streams. The detectors operate on streams of image data, making them suitable for detecting certain types of objects in documents and images passed between processes and devices. For instance, the streaming mode detectors operate in printer drivers on streams of image data being passed to a printer. Also, the streaming mode detectors operate in scanner drivers on streams of image data being passed from a scanner. The disclosure describes pattern detectors for shapes with complex features as well as objects comprised of many smaller shapes. The disclosure also describes novel raster line and edge tracing pattern techniques.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: December 19, 2006
    Assignee: Digimarc Corporation
    Inventors: Lance Lixin Shen, Stephen K. Decker, Clayton L. Davidson
  • Publication number: 20040250080
    Abstract: Various improvements and applications for digital watermarking technology are detailed. One concerns techniques for making watermarks resistant to malicious attacks. Another involves using digital watermarking with ID cards and credentials, such as a watermarked driver's license conveying a user's cryptographic PKI. Still another uses digital watermarks in connection with automated compliance audits for corporate users of electronic content. A variety of other technologies are also detailed.
    Type: Application
    Filed: February 5, 2004
    Publication date: December 9, 2004
    Inventors: Kenneth L. Levy, Ravi K. Sharma, Lance Lixin Shen, John Stach
  • Publication number: 20030086614
    Abstract: The disclosure describes pattern recognition detectors and software used to detect objects in image streams. The detectors operate on streams of image data, making them suitable for detecting certain types of objects in documents and images passed between processes and devices. For instance, the streaming mode detectors operate in printer drivers on streams of image data being passed to a printer. Also, the streaming mode detectors operate in scanner drivers on streams of image data being passed from a scanner. The disclosure describes pattern detectors for shapes with complex features as well as objects comprised of many smaller shapes. The disclosure also describes novel raster line and edge tracing pattern techniques.
    Type: Application
    Filed: September 5, 2002
    Publication date: May 8, 2003
    Inventors: Lance Lixin Shen, Stephen K. Decker, Clayton L. Davidson