| Patent Number |
Title Of Patent |
Date Issued |
| 7191154 |
Apparatus for encrypting and recording received content information on a recording medium using |
March 13, 2007 |
| A content recording method using a communication means, including reading from a recording medium identification information unique to that recording medium, receiving through the communication means permission information for permitting recording of content on that recording medium, |
| 7127430 |
Recording medium, recorder, reproducer, cryptocommunication system and program license system |
October 24, 2006 |
| The operating and other procedures of a disk or recording medium application system of the type for which a network is used are simplified. Disks or recording media have auxiliary data recording areas, where different IDs for individual disk, and/or cipher keys and/or decoding keys f |
| 6885629 |
Recordable optical disk including an auxiliary information presence indicator |
April 26, 2005 |
| An optical disk having a first recording area for recording information; and a second recording area having auxiliary information including disk identification information unique to that optical disk recorded therein, wherein the second recording area including circumferentially arranged |
| 6778969 |
Method and apparatus for encrypting and recording received content information on a recording me |
August 17, 2004 |
| A content recording method using a communication means, including reading from a recording medium identification information unique to that recording medium, receiving through the communication means permission information for permitting recording of content on that recording medium, |
| 6633853 |
Recordable optical disk encrypted with disk identification and multiple keys |
October 14, 2003 |
| An optical disk recordable by a recording device and having first and second recording areas, the second recording area having recorded therein disk identification information unique to the disk, and multiple cipher keys, the first recording area being capable of having recorded therein |
| 6622132 |
Device for encoding encrypted information on an optical disk |
September 16, 2003 |
| A device for recording information on an optical disk having first and second recording areas, which device can record information into the first recording area, using a first modulation method; read disk identification information recorded by a second modulation method in the second rec |
| 6611820 |
Recording medium, recorder, reproducer, cryptocommunication system and program license system |
August 26, 2003 |
| The operating and other procedures of a disk or recording medium application system of the type for which a network is used are simplified. Disks or recording media have auxiliary data recording areas, where different IDs for individual disks, and/or cipher keys and/or decoding keys |
| 6408285 |
Optical disk reading device using both a decipher key and disk identification information for de |
June 18, 2002 |
| A device for reading encrypted information from an optical disk having first and second recording areas, which device can read encrypted information recorded by a first modulation method in the first recording area, read disk identification information recorded by a second modulation |
| 6381588 |
Optical disk recordable using both a cipher key and disk identification information for encrypti |
April 30, 2002 |
| The operating and other procedures of an optical disk application system of the type for which a network is used are simplified. Optical disks have auxiliary data recording areas, where different IDs for individual disks, and/or cipher keys and/or decoding keys for ciphers are recorded i |
| 6343282 |
Optical disk reading device using both a decipher key and disk identification information |
January 29, 2002 |
| A device for reading encrypted information recorded on an optical disk having first and second recording areas, the device can read disk identification information recorded in the second recording area, select a specific decipher key among multiple decipher keys, and decrypt encrypted |
| 6301569 |
Optical disk, optical recorder, optical reproducer, cryptocommunication system and program licen |
October 9, 2001 |
| A device for recording information on an optical disk having first and second recording areas, which device can record information using a first modulation method into a first recording area, read disk identification information recorded by a second modulation method in a second recordin |
| 6081785 |
Optical disk, optical recorder, optical reproducer, crytocommunication system and program licens |
June 27, 2000 |
| The operating and other procedures of an optical disk application system of the type for which a network is used are simplified. Optical disks have auxiliary data recording areas, where different IDs for individual disks, and/or cipher keys and/or decoding keys for ciphers are recorded i |
| 5298998 |
Synchronous clock generator and time-base error corrector |
March 29, 1994 |
| In a clock generator circuit, a zero hold circuit produces from a fixed clock signal a zero hold clock signal which is in phase with an external sync signal. A phase comparator circuit produces phase difference data indicating the phase difference between the external sync signal and an |
