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
CA763569A
Inventor
F. Boening Elroy
Original Assignee
Allis Chalmers Corp
Publication date
Application grantedgrantedCritical
Publication of CA763569ApublicationCriticalpatent/CA763569A/en