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 JP13922583Aexternal-prioritypatent/JPS6031381A/ja
Priority claimed from JP58139226Aexternal-prioritypatent/JPS6031378A/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP84305095Aexternal-prioritypatent/EP0133026B1/de
Application grantedgrantedCritical
Publication of ATE42660T1publicationCriticalpatent/ATE42660T1/de