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Priority to JP1987056693UpriorityCriticalpatent/JPH0521132Y2/ja
Publication of JPS63168520UpublicationCriticalpatent/JPS63168520U/ja
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Publication of JPH0521132Y2publicationCriticalpatent/JPH0521132Y2/ja
Shaft lock device with coil spring inserted in rotational shaft of hinge mechanism and portable information processing apparatus with shaft lock device