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 US07/133,547external-prioritypatent/US4780797A/en
Priority claimed from US07/319,556external-prioritypatent/US4942500A/en
Application filed by Tansitor Electronics IncfiledCriticalTansitor Electronics Inc
Priority claimed from EP19880311896external-prioritypatent/EP0321255B1/de
Application grantedgrantedCritical
Publication of ATE89948T1publicationCriticalpatent/ATE89948T1/de