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
CA898707A
Inventor
J. Bubbers John
P. Kuehn John
E. Fox James
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.)
Pickering and Co Inc
Original Assignee
Pickering and Co Inc
Publication date
Application grantedgrantedCritical
Publication of CA898707ApublicationCriticalpatent/CA898707A/en