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Backup management device, backup management method, computer...

Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate

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Batch mode session-based encryption of video on demand content

Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate

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Billing method for customers having IP telephony service...

Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate

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Blind watermarking of audio signals by using phase...

Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate

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Block ciphering system, using permutations to hide the core...

Cryptography – Video cryptography
Reexamination Certificate

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Book data service system with data delivery by broadcasting

Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate

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Broadcast receiving system comprising a computer and a decoder

Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate

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Broadcast reception device and contract management device...

Cryptography – Video cryptography – Video electric signal modification
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