Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP58139965Aexternal-prioritypatent/JPS6032141A/en
Priority claimed from JP58140139Aexternal-prioritypatent/JPS6032142A/en
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP84305096Aexternal-prioritypatent/EP0133027B1/en
Application grantedgrantedCritical
Publication of ATE34243T1publicationCriticalpatent/ATE34243T1/en