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
CA909640A
Inventor
R. Porter Clyde
L. Porter Percy
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.)
Hydro Aire Inc
Original Assignee
PL Porter Co
Publication date
Application grantedgrantedCritical
Publication of CA909640ApublicationCriticalpatent/CA909640A/en