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
CA772963A
Inventor
M. Hartmann Louis
B. A. Hansen Albert
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.)
Brodrene Hartmann AS
Original Assignee
Brodrene Hartmann AS
Publication date
Application grantedgrantedCritical
Publication of CA772963ApublicationCriticalpatent/CA772963A/en