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 JP11978487UpriorityCriticalpatent/JPS6425557U/ja
Priority to US07/172,314prioritypatent/US4874352A/en
Publication of JPS6425557UpublicationCriticalpatent/JPS6425557U/ja
Priority to US07/354,464prioritypatent/US4881927A/en
