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Priority to JP10980275ApriorityCriticalpatent/JPS5233768A/ja
Publication of JPS5233768ApublicationCriticalpatent/JPS5233768A/ja
Publication of JPS5545875B2publicationCriticalpatent/JPS5545875B2/ja
Alarm clock having means for bridging two circular conducting paths via an adjustable contact means thereby causing generation of an acoustic alarm system