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 US07/038,008external-prioritypatent/US4966964A/en
Priority claimed from US07/177,942external-prioritypatent/US5019556A/en
Application filed by Harvard CollegefiledCriticalHarvard College
Priority claimed from EP88105781Aexternal-prioritypatent/EP0291686B1/de
Application grantedgrantedCritical
Publication of ATE95703T1publicationCriticalpatent/ATE95703T1/de