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
CA806889A
Inventor
Frank Speno, Jr.
Panetti Romolo
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.)
Frank Speno Railroad Ballast Cleaning Co Inc
Original Assignee
Frank Speno Railroad Ballast Cleaning Co Inc
Publication date
Application grantedgrantedCritical
Publication of CA806889ApublicationCriticalpatent/CA806889A/en