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
CA711854A
Inventor
N. Hadley Wilfred
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.)
Parks and Woolson Machine Co
Original Assignee
Parks and Woolson Machine Co
Publication date
Application grantedgrantedCritical
Publication of CA711854ApublicationCriticalpatent/CA711854A/en