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
CA651408A
Inventor
J. Lloyd Alfred
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.)
Heywood Wakefield Co
Original Assignee
Heywood Wakefield Co
Publication date
Application grantedgrantedCritical
Publication of CA651408ApublicationCriticalpatent/CA651408A/en