Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Priority to JP1989048878UpriorityCriticalpatent/JPH02140680U/ja
Priority to CA002015416Aprioritypatent/CA2015416C/en
Priority to KR1019900006101Aprioritypatent/KR930002404B1/ko
Priority to US07/514,887prioritypatent/US5090010A/en
Publication of JPH02140680UpublicationCriticalpatent/JPH02140680U/ja
