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Priority to JP323283UpriorityCriticalpatent/JPS59109714U/ja
Publication of JPS59109714UpublicationCriticalpatent/JPS59109714U/ja
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Publication of JPS6344405Y2publicationCriticalpatent/JPS6344405Y2/ja
Vertically eccentric, horizontally symmetric, mobile and fixed buoyant in combination with mobile and fixed ballast as a type a personal flotation device