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
CA712521A
Inventor
G. Bonin Lawrence
G. Smith William
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.)
Symons Manufacturing Co
Original Assignee
Lawrence G Bonin
Symons Manufacturing Co
Publication date
Application grantedgrantedCritical
Publication of CA712521ApublicationCriticalpatent/CA712521A/en