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
CA804572A
Inventor
W. Tufts Marshall
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.)
Screw and Bolt Corp of America
Original Assignee
Screw and Bolt Corp of America
Publication date
Application grantedgrantedCritical
Publication of CA804572ApublicationCriticalpatent/CA804572A/en