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Class Information
Number: 380/201
Name: Cryptography > Video cryptography > Copy protection or prevention
Description: Subject matter which prevents rerecording of a stored picture signal representative of a time varying object or image.

Sub-classes under this class:

Class Number Class Name Patents
380/203 Having copy protect signal 561
380/202 Having origin or program id 384
380/204 Modifying sync signal 166

Patents under this class:
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Patent Number Title Of Patent Date Issued
7386126 Content protection system, key data generation apparatus, and terminal apparatus Jun. 10, 2008
7386125 Techniques of imperceptibly altering the spectrum of a displayed image in a manner that discourages copying Jun. 10, 2008
7382969 Method and system for preventing the unauthorized copying of video content Jun. 3, 2008
7382905 Desynchronized fingerprinting method and system for digital multimedia data Jun. 3, 2008
7382879 Digital rights management negotiation for streaming media over a network Jun. 3, 2008
7380134 Information recording/reproducing apparatus and method of executing encryption processing May. 27, 2008
7380132 Data recording method and apparatus, data record medium and data reproducing method and apparatus May. 27, 2008
7380120 Secured data format for access control May. 27, 2008
7379547 Reproducing apparatus, recording apparatus and display apparatus May. 27, 2008
7376337 Video signal recording apparatus for copyrighted works May. 20, 2008
7373521 Semiconductor IC, information processing method, information processing device, and program storage medium May. 13, 2008
7373506 Data authentication system May. 13, 2008
7370367 Security device and article incorporating same May. 6, 2008
7369675 Data processing apparatus and method May. 6, 2008
7366908 Digital watermarking with content dependent keys and autocorrelation properties for synchronization Apr. 29, 2008
7366764 Method for the identification and management of mass unsolicited e-mail Apr. 29, 2008
7362336 Four color digital cinema system with extended color gamut and copy protection Apr. 22, 2008
7359884 Method and apparatus for processing usage rights expressions Apr. 15, 2008
7359510 Information recording/replaying apparatus and method Apr. 15, 2008
7356513 Method for minimizing pirating and/or unauthorized copying and/or unauthorized access of/to data on/from data media including compact discs and digital versatile discs, and system and data med Apr. 8, 2008
7356512 Contents mediating system and contents mediating method Apr. 8, 2008
7356511 Method and apparatus for marking content during distribution of the content to a client Apr. 8, 2008
7356161 Class of symmetric lattices for quantization and data embedding Apr. 8, 2008
7356143 System, method, and apparatus for securely providing content viewable on a secure device Apr. 8, 2008
7356142 Secure compact disk and player Apr. 8, 2008
7353540 Information vending apparatus, information vending method, and program storage medium Apr. 1, 2008
7353211 Method for encrypting data and a telecommunications terminal and access authorization card Apr. 1, 2008
7353207 Method of altering a software product in response to predetermined events Apr. 1, 2008
7353205 Method for causing a digital product to revert to a demo mode Apr. 1, 2008
7352863 Copy protection for video signal using narrowed horizontal synchronization signals and amplitude modulation Apr. 1, 2008
7346585 Computer software and services license processing method and system Mar. 18, 2008
7346560 Protecting content from unauthorized reproduction Mar. 18, 2008
7346185 Optical content modulation for visual copyright protection Mar. 18, 2008
7343495 Information recording apparatus, information reproducing apparatus, and information distribution system Mar. 11, 2008
7343494 Method to protect software against unwanted use with a "renaming" principle Mar. 11, 2008
7343012 Recording and playback apparatus for stream data and transmission method for stream data Mar. 11, 2008
7340778 Method and apparatus for ensuring the copy protection of digital data Mar. 4, 2008
7340152 Method and system of copy protection of information Mar. 4, 2008
7340055 Memory card and data distribution system using it Mar. 4, 2008
7337328 Secure video card methods and systems Feb. 26, 2008
7336887 Content play back, information processing, and play back restriction Feb. 26, 2008
7336789 System for providing encrypted data, system for decrypting encrypted data and method for providing a communication interface in such a decrypting system Feb. 26, 2008
7336787 Critical packet partial encryption Feb. 26, 2008
7336786 Reproduction apparatus Feb. 26, 2008
7336785 System and method for copy protecting transmitted information Feb. 26, 2008
7334265 System and program for preventing unauthorized copying of software Feb. 19, 2008
7333958 Electronic settlement system, settlement management device, store device, client device, data storage device, computer program, and storage medium Feb. 19, 2008
7333716 Duplication controlling method, duplication controlling apparatus, recording medium, and duplication controlling program embodied on computer-readable medium Feb. 19, 2008
7333610 System and method for pre-encryption of transmitted content Feb. 19, 2008
7332706 Detecting and thwarting imaging systems at theatrical performances Feb. 19, 2008

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