A disk replication apparatus is used when the stamper and the like of a compact disk is made from an original compact disk, and the apparatus permits the compact disk to be simply and securely made. A compact disk is replicated in such a manner that main data D1 continued in the format of audio data...http://www.google.de/patents/US5414688?utm_source=gb-gplus-sharePatent US5414688 - Disk replication apparatus