Limbach & Limbach LLP
Multi-session disc-shaped for recording audio and computer data having disc type code area located in each session for recording common and particular disc type code
 A recording apparatus, a reproducing apparatus and a multi-session disc-shaped recording medium (CD-R disc) having a first session comprised only of audio tracks, a first disc code specifying the audio session and which is recorded in the lead-in area of the first session, and a second disc code which is recorded in the remaining sessions on the CD-R disc. 
Sony Corporation
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Hiroyuki Shigeki Tatsuya
Ito Tsukatani Inokuchi