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
CA838424A
Inventor
H. Carslaw Charles
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.)
Drysdale and Co Ltd
Original Assignee
Charles H Carslaw
Drysdale and Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA838424ApublicationCriticalpatent/CA838424A/en