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
CA 1235
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.)
JOHN FIRSTBROOK
WILLIAM A FIRSTBROOK
Original Assignee
JOHN FIRSTBROOK
WILLIAM A FIRSTBROOK
Publication date
Priority to CA 1235priorityCriticalpatent/CA1235S/en
Application grantedgrantedCritical
Publication of CA1235SpublicationCriticalpatent/CA1235S/en