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Priority to JP10423886UpriorityCriticalpatent/JPH019991Y2/ja
Publication of JPS6311697UpublicationCriticalpatent/JPS6311697U/ja
Application grantedgrantedCritical
Publication of JPH019991Y2publicationCriticalpatent/JPH019991Y2/ja
Priority to US07/401,526prioritypatent/US4995294A/en
Priority to US07/606,116prioritypatent/US5157213A/en
Priority to US07/890,543prioritypatent/US5350881A/en