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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokina Optical Co Ltd
Dainippon Screen Manufacturing Co Ltd
Original Assignee
Tokina Optical Co Ltd
Dainippon Screen Manufacturing Co Ltd
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.)
Filing date
Publication date
Application filed by Tokina Optical Co Ltd, Dainippon Screen Manufacturing Co LtdfiledCriticalTokina Optical Co Ltd
Priority to JP50146174ApriorityCriticalpatent/JPS5269518A/ja
Publication of JPS5269518ApublicationCriticalpatent/JPS5269518A/ja
Publication of JPS5642192B2publicationCriticalpatent/JPS5642192B2/ja