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
CA872203A
Inventor
M. Pickles Kathleen
Hirst Harry
G. French William
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.)
Linton and Hirst Ltd
Original Assignee
Linton and Hirst Ltd
Publication date
Application grantedgrantedCritical
Publication of CA872203ApublicationCriticalpatent/CA872203A/en