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
CA851364A
Inventor
A. Hall 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.)
ALARM DEVICE MANUFACTURING Co DIVISION OF PITTSBURGH RAILWAYS Co
Original Assignee
ALARM DEVICE MANUFACTURING Co DIVISION OF PITTSBURGH RAILWAYS Co
Publication date
Application grantedgrantedCritical
Publication of CA851364ApublicationCriticalpatent/CA851364A/en