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
CA754421A
Inventor
R. A. Wilson Kenneth
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.)
Irving Air Chute Co Inc
Original Assignee
Kenneth R A Wilson
Irving Air Chute Co Inc
Publication date
Application grantedgrantedCritical
Publication of CA754421ApublicationCriticalpatent/CA754421A/en