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
CA643308A
Inventor
S. Morrison Charles
E. Harrington Roy
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.)
Deere and Co
Original Assignee
Charles S Morrison
Deere and Co
Publication date
Application grantedgrantedCritical
Publication of CA643308ApublicationCriticalpatent/CA643308A/en