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
CA593097A
Inventor
H. Zeilman 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.)
Thew Shovel Co
Original Assignee
Thew Shovel Co
Publication date
Application grantedgrantedCritical
Publication of CA593097ApublicationCriticalpatent/CA593097A/en