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
CA601878A
Inventor
H. Tanke Willard
G. Buhr August
Original Assignee
Allis Chalmers Corp
Publication date
Application grantedgrantedCritical
Publication of CA601878ApublicationCriticalpatent/CA601878A/en