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 JP60020683Aexternal-prioritypatent/JPH0720227B2/ja
Priority claimed from JP60027423Aexternal-prioritypatent/JPH0752938B2/ja
Application filed by Sony CorpfiledCriticalSony Corp
Priority claimed from EP86300744Aexternal-prioritypatent/EP0190919B2/de
Application grantedgrantedCritical
Publication of ATE69131T1publicationCriticalpatent/ATE69131T1/de