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
CA814686A
Inventor
M. Barton Donald
Robinson Colin
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.)
De la Rue Frigistor Ltd
Original Assignee
De la Rue Frigistor Ltd
Publication date
Application grantedgrantedCritical
Publication of CA814686ApublicationCriticalpatent/CA814686A/en