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
CA775804A
Inventor
H. Wood Herbert
M. Wilson Clarence
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.)
Thomas Walker Ltd
Original Assignee
Thomas Walker Ltd
Publication date
Application grantedgrantedCritical
Publication of CA775804ApublicationCriticalpatent/CA775804A/en