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Priority claimed from GB888821800Aexternal-prioritypatent/GB8821800D0/en
Priority claimed from GB888821771Aexternal-prioritypatent/GB8821771D0/en
Application filed by Glass Bulbs LtdfiledCriticalGlass Bulbs Ltd
Priority claimed from EP19890309335external-prioritypatent/EP0359563B1/en
Application grantedgrantedCritical
Publication of ATE101106T1publicationCriticalpatent/ATE101106T1/en