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
CA839136A
Inventor
W. Macdonnell Robert
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.)
Unity Railway Supply Co Inc
Original Assignee
Unity Railway Supply Co Inc
Publication date
Application grantedgrantedCritical
Publication of CA839136ApublicationCriticalpatent/CA839136A/en