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
CA755849A
Inventor
R. Lee Donald
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.)
S CURTIS AND SON Inc
Original Assignee
S CURTIS AND SON Inc
Publication date
Application grantedgrantedCritical
Publication of CA755849ApublicationCriticalpatent/CA755849A/en