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
CA708757A
Inventor
E. Ruffell Leslie
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.)
STERLING ENGINEERING Co Ltd
Original Assignee
STERLING ENGINEERING Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA708757ApublicationCriticalpatent/CA708757A/en