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 JP13457386Uexternal-prioritypatent/JPH0422333Y2/ja
Priority claimed from JP14687186Uexternal-prioritypatent/JPH0422334Y2/ja
Priority claimed from PCT/JP1987/000649external-prioritypatent/WO1988001754A1/en
Application filed by Asahi Optical Co LtdfiledCriticalAsahi Optical Co Ltd
Publication of HK39892ApublicationCriticalpatent/HK39892A/en