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
CA820473A
Inventor
D. Mannherz Elmer
F. Schmoock Roy
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.)
Fischer and Porter Canada Ltd
Original Assignee
Fischer and Porter Canada Ltd
Publication date
Application grantedgrantedCritical
Publication of CA820473ApublicationCriticalpatent/CA820473A/en