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
CA639054A
Inventor
Hall Thomas
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.)
JH Fenner and Co Ltd
Original Assignee
JH Fenner and Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA639054ApublicationCriticalpatent/CA639054A/en