Tynax ~ Patent Library

Patent Portfolio for Sale:

DVD Copy Protection    

Optical Disk Drive Media & Data Copy Protection


These inventions relate to copy protection techniques for optical storage (including, DVD, Blu-ray or HD-DVD). They cover various methods to optimize disc access, leveraging spatial features on the discs or specific data patterns in the user data. This lot also contains inventions that relate to accurate positioning of data marks and spaces.

The seller would like to be granted a license back.

Patent Summary

U.S. Patent Classes & Classifications Covered in this listing:

Class 705: Data Processing:Financial, Business Practice, Management, Or Cost/Price Determination

This is the generic class for apparatus and corresponding methods for performing data processing operations, in which there is a significant change in the data or for performing calculation operations wherein the apparatus or method is uniquely designed for or utilized in the practice, administration, or management of an enterprise, or in the processing of financial data. It also provides for apparatus and corresponding methods for performing data processing or calculating operations in which a charge for goods or services is determined.

Subclass 57: Copy protection or prevention

Class 380: Cryptography

Equipment and processes which (a) conceal or obscure intelligible information by transforming such information so as to make the information unintelligible to a casual or unauthorized recipient, or (b) extract intelligible information from such a concealed representation, including breaking of unknown codes and messages.

Subclass 201: Copy protection or prevention
Subclass 203: Having copy protect signal
Subclass 217: Having compression (e.g., MPEG)
Subclass 268: Pseudo-random sequence scrambling

Class 386: Television Signal Processing For Dynamic Recording Or Reproducing

Apparatus and corresponding processes for processing a sequence of images, in which the light variation composing the images may change with time for dynamic recording or reproducing of the sequence of images. The processing involves the following steps: (a) Receiving a sequence of images from a local (e.g., camera, etc.) or remote source (e.g. broadcasting station, satellite, cable, etc.); (b) Converting the received sequence of images into a form suitable for dynamic storage, which form may or may not be reproduced later; or (c) Converting retrieved information from a dynamic storage medium into a sequence of images.

Subclass 124: Digital recording or reproducing
Subclass 94: Record protection (e.g., anti-copying)
Subclass E5.004: For scrambling; for copy protection (EPO)

Class G9B/20.002:

Class G9B/20.041:

Class G9B/20.053:

Class 341: Coded Data Generation Or Conversion

1) originating or emitting a coded set of discrete signals or 2) translating one code into another code wherein the information signal content remains the same but the formats may differ. For classification herein, at least one of the codes must be a set of pulses or digits and electrical in nature.

Subclass 58: To or from minimum d.c. level codes
Subclass 59: To or from run length limited codes
Subclass 69: Return-to-zero to or from NRZ (nonreturn-to-zero) codes

Class 360: Dynamic Magnetic Information Storage Or Retrieval

This class is an integral part of Class 369, Dynamic Information Storage or Retrieval, and is the specific class for apparatus and corresponding processes for the storage and retrieval of information based on relative movement between a magnetic record carrier and a transducer. It includes apparatus and corresponding processes for making copies or editing of records falling within the above definition. A magnetic record carrier within the meaning of this class is an element which consists of a magnetizable material or is comprised of a coating or impregnation of magnetizable material which is intended for the storage of more than a single bit of information.

Subclass 60: Recording-or erasing-prevention

Class 714: Error Detection/Correction And Fault Detection/Recovery

This class provides for process or apparatus for detecting and correcting errors in electrical pulse or pulse coded data; it also provides for process or apparatus for detecting and recovering from faults in electrical computers and digital data processing systems, as well as logic level based systems.

Subclass 800: Parity bit

Class 369: Dynamic Information Storage Or Retrieval

Apparatus for the storage or retrieval of arbitrarily variable information which is retained in a storage medium by variation of a physical characteristic. The information is stored or retrieved by causing or sensing a variation of a physical characteristic of the storage medium by a transducer having relative motion along a continuous path.

Subclass 11: Including separable assembly
Subclass 30.21: Monitoring signal error or verification
Subclass 47.53: Stored and retrieved testing signal
Subclass 53.21: For protection
Subclass 53.34: Time based parameter
Subclass 53.35: Signal error correcting or detecting
Subclass 53.36: During storage
Subclass 275.3: Track data format/layout
Subclass 275.4: Pit/bubble/groove structure specifies

Class G9B/23.087:

Class G9B/7.035:

Class G9B/7.016:

Class G9B/27.027:

Class G9B/7.01: