Patent Portfolio

HIDING INFORMATION OUT-OF-PHASE IN COLOR CHANNELS

6,891,959

DIGITALLY WATERMARKING HOLOGRAMS FOR IDENTITY DOCUMENTS

6,882,737

TILE-BASED DIGITAL WATERMARKING TECHNIQUES

6,879,701

LINKING DOCUMENTS THROUGH DIGITAL WATERMARKING

6,869,023

METHOD AND APPARATUS FOR AUTOMATIC ID MANAGEMENT

6,868,497

METHODS EMPLOYING MULTIPLE WATERMARKS

6,850,626

ESTABLISHING AND INTERACTING WITH ON-LINE MEDIA COLLECTIONS USING IDENTIFIERS IN MEDIA SIGNALS

6,829,368

AUTHENTICATION WATERMARKS FOR PRINTED OBJECTS AND RELATED APPLICATIONS

6,823,075

SYSTEM AND METHOD FOR MANAGING COPYRIGHTED ELECTRONIC MEDIA

6,807,534

DETECTING INFORMATION HIDDEN OUT-OF-PHASE IN COLOR CHANNELS

6,804,377

EQUIPMENT EMPLOYING WATERMARK-BASED AUTHENTICATION FUNCTION

6,804,376

METHOD AND APPARATUS FOR WATERMARKING VIDEO IMAGES

6,798,894

AUTHENTICATING OBJECTS USING EMBEDDED DATA

6,788,800

WATERMARK HOLOGRAMS

6,782,115

WATERMARKS CARRYING CONTENT DEPENDENT SIGNAL METRICS FOR DETECTING AND CHARACTERIZING SIGNAL ALTERATION

6,771,797

DIGITAL WATERMARK SCREENING AND DETECTION DEVICES

6,768,809

METHODS FOR READING WATERMARKS IN UNKNOWN DATA TYPES, AND DVD DRIVES WITH SUCH FUNCTIONALITY

6,766,102

EMBEDDING DIGITAL WATERMARKS IN SPOT COLORS

6,763,124

DETECTION OF OUT-OF-PHASE LOW VISIBILITY WATERMARKS

6,763,123

WATERMARKING AN IMAGE IN COLOR PLANE SEPARATIONS AND DETECTING SUCH WATERMARKS

6,763,122

HALFTONE WATERMARKING AND RELATED APPLICATIONS

6,760,464

WATERMARKING METHODS AND MEDIA

6,760,463

STEGANOGRAPHIC IMAGE PROCESSING

6,757,406

DIGITAL WATERMARK DETECTING WITH WEIGHTING FUNCTION

6,751,337

METHOD AND SYSTEM FOR PREVENTING REPRODUCTION OF PROFESSIONAL PHOTOGRAPHS

6,751,320