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.)
Priority date (The priority date 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 date listed.)
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Priority to JP4982485UpriorityCriticalpatent/JPS61166855U/ja
Priority to GB8606036Aprioritypatent/GB2172549B/en
Priority to US06/839,046prioritypatent/US4799814A/en
Publication of JPS61166855UpublicationCriticalpatent/JPS61166855U/ja
Priority to US07/227,547prioritypatent/US4934850A/en
