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
CA805470A
Inventor
Koeller Paul
H. Lang Johann
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.)
Dominion Engineering Works Ltd
Original Assignee
Dominion Engineering Works Ltd
Publication date
Application grantedgrantedCritical
Publication of CA805470ApublicationCriticalpatent/CA805470A/en