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
CA1890F
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.)
FREDERICK SMART DOWNHAM
Original Assignee
FREDERICK SMART DOWNHAM
Publication date
Priority to CA1890FpriorityCriticalpatent/CA1890S/en
Application grantedgrantedCritical
Publication of CA1890SpublicationCriticalpatent/CA1890S/en