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
CA762681A
Inventor
Geoffrey B. Thompson
Robert D. Thompson
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.)
KELVIN-THOMPSON Co Ltd
Original Assignee
KELVIN-THOMPSON Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA762681ApublicationCriticalpatent/CA762681A/en