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
CA707685A
Inventor
G. Benjey William
D. Reynolds 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.)
ALPENA RESEARCH AND DEVELOPMENT Co
Original Assignee
ALPENA RESEARCH AND DEVELOPMENT Co
Publication date
Application grantedgrantedCritical
Publication of CA707685ApublicationCriticalpatent/CA707685A/en