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.)
Expired - Lifetime
Application number
AU31213/63A
Inventor
Alexander Newman Douglas
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.)
Columbia Oldson And Carbon Manufacturing Co Inc
Original Assignee
Columbia Oldson And Carbon Manufacturing Co Inc
Filing date
Publication of AU275465B2publicationCriticalpatent/AU275465B2/en
Application filed by Columbia Oldson And Carbon Manufacturing Co IncfiledCriticalColumbia Oldson And Carbon Manufacturing Co Inc