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
CA651347A
Inventor
B. Kay Ian
C. Rooney Sidney
Kragh-Hansen Svend
Vajda Peter
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.)
COLUMBIA ENGINEERING Co
Original Assignee
COLUMBIA ENGINEERING Co
Publication date
Application grantedgrantedCritical
Publication of CA651347ApublicationCriticalpatent/CA651347A/en