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Your search returned 282 patents.
( 380/203 in Current US Classification ) |
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| Patent ID | Title | Date Filed |
| 7058819 | Data processing system, data processing method, and program providing medium
| July 24, 2001 |
| 7058809 | Method and system to uniquely associate multicast content with each of multiple recipients
| March 6, 2001 |
| 7058608 | Copyright information management system
| July 19, 2000 |
| 7057993 | Copy protection using multiple security levels on a programmable CD-ROM
| January 29, 2001 |
| 7054839 | Transmission apparatus and method, reception apparatus and method, management apparatus and method, charging apparatus and method, providing apparatus and method, and recording medium
| April 2, 2001 |
| 7054443 | System and method for protecting digital goods using random and automatic code obfuscation
| March 27, 2000 |
| 7051207 | Apparatus and methods for inserting and detecting electronic watermark
| April 5, 2001 |
| 7050698 | Method and apparatus for synthesizing or modifying a copy protection signal using a lowered signal level portion
| August 15, 2000 |
| 7047421 | Data signal with a database and a compressed key
| November 5, 2004 |
| 7046819 | Encoded reference signal for digital watermarks
| April 24, 2002 |
| 7043452 | Lock-and-key consumer billing data protection system having data encryption capability
| May 31, 2002 |
| 7043138 | Broadcast receiver and system for performing copy prohibition and timed recording
| December 22, 1999 |
| 7039294 | Method and apparatus for modifying the effects of color burst modifications to a video signal
| October 2, 2001 |
| 7039187 | Signal reproducing/recording/transmitting method and apparatus and signal record medium
| June 20, 2001 |
| 7035827 | Content receiving apparatus and method, storage medium, and server
| October 16, 2001 |
| 7031470 | Protection of data on media recording disks
| August 16, 1999 |
| 7028184 | Technique for digitally notarizing a collection of data streams
| January 17, 2001 |
| 7023993 | Signal reproducing/recording/transmitting method and apparatus and signal record medium for use with signals featuring a multiple-phase color burst
| January 7, 2000 |
| 7023992 | Data multiplexing device, program distribution system, program transmission system, pay broadcast system, program transmission method, conditional access system, and data reception device
| August 9, 1999 |
| 7020062 | Information recording medium with a track carrying a randomized wobble signal, and apparatus for reading such
| May 2, 2002 |
| 7017171 | System and method for interfacing multiple electronic devices
| March 18, 1999 |
| 7013078 | Data processing apparatus, data processing method, data reading apparatus, and recording apparatus
| December 28, 2000 |
| 7007165 | Watermark system
| April 7, 2000 |
| 7006661 | Digital watermarking systems and methods
| October 21, 2002 |
| 7006630 | Methods and apparatus for digital content protection
| June 3, 2003 |
| 7003675 | Encrypted content data structure package and generation thereof
| November 5, 2004 |
| 6999948 | Memory card
| August 9, 2000 |
| 6999587 | Information recording/reproducing system
| February 7, 2000 |
| 6996248 | Apparatus and method for watermarking a digital image
| June 13, 2001 |
| 6990584 | Method of and apparatus for restricting copy of digital information, and apparatus for recording digital information
| December 3, 1999 |
| 6988086 | Document services management including availability reporting of document distribution services
| June 25, 2001 |
| 6985584 | Non-volatile record medium, recording method, and recording apparatus
| March 27, 2000 |
| 6981272 | Data processing apparatus and method for preventing unauthorized copying
| September 19, 2000 |
| 6980653 | Signal reproducing/recording/transmitting method and apparatus and signal record medium
| July 6, 2000 |
| 6978377 | Copy protection using detailed copy control information
| December 15, 2000 |
| 6973445 | Demarcated digital content and method for creating and processing demarcated digital works
| May 31, 2001 |
| 6971024 | Recording medium, data recording method and apparatus, data reproducing method and apparatus, and copying control method
| July 13, 2001 |
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