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Priority claimed from NL7811597Aexternal-prioritypatent/NL7811597A/nl
Priority claimed from DE19792928264external-prioritypatent/DE2928264A1/de
Application filed by N.V. Philips' GloeilampenfabriekenfiledCriticalN.V. Philips' Gloeilampenfabrieken
Priority claimed from EP79200687Aexternal-prioritypatent/EP0011899B1/de
Application grantedgrantedCritical
Publication of ATE1688T1publicationCriticalpatent/ATE1688T1/de