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.)
Farrand Optical Co Inc
Original Assignee
Farrand Optical Co Inc
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 Farrand Optical Co IncfiledCriticalFarrand Optical Co Inc
Priority to FR122827ApriorityCriticalpatent/FR1538263A/fr
Application grantedgrantedCritical
Publication of FR1538263ApublicationCriticalpatent/FR1538263A/fr