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Priority claimed from JP9989987Uexternal-prioritypatent/JPS644488U/ja
Priority claimed from JP9989787Uexternal-prioritypatent/JPS644486U/ja
Priority claimed from JP9989887Uexternal-prioritypatent/JPS644487U/ja
Application filed by Japan Engine Valve Mfg, Asahi Keiki Seisakusho KkfiledCriticalJapan Engine Valve Mfg
Priority claimed from EP88303186Aexternal-prioritypatent/EP0300592B1/en
Application grantedgrantedCritical
Publication of ATE77478T1publicationCriticalpatent/ATE77478T1/en