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
CA628966A
Inventor
H. Carr John
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.)
DURA-VENT Corp
Original Assignee
DURA-VENT Corp
Publication date
Application grantedgrantedCritical
Publication of CA628966ApublicationCriticalpatent/CA628966A/en