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 US07/446,936external-prioritypatent/US4943899A/en
Application filed by Jeou Nan TsengfiledCriticalJeou Nan Tseng
Application grantedgrantedCritical
Publication of ATE101250T1publicationCriticalpatent/ATE101250T1/en