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Priority to JP8124281UpriorityCriticalpatent/JPS6142147Y2/ja
Publication of JPS57192489UpublicationCriticalpatent/JPS57192489U/ja
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Publication of JPS6142147Y2publicationCriticalpatent/JPS6142147Y2/ja
Alarm clock having means for bridging two circular conducting paths via an adjustable contact means thereby causing generation of an acoustic alarm system