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
Application number
CA895733A
Inventor
L. Whittaker Robert
Donofry Joseph
L. Berg Thorval
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.)
Greene Tweed and Co
Original Assignee
Greene Tweed and Co
Publication date
Application grantedgrantedCritical
Publication of CA895733ApublicationCriticalpatent/CA895733A/en