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
CA674762A
Inventor
W. Davison Gordon
O. Ferm Glenn
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.)
SPX Corp
Original Assignee
Glenn O Ferm
General Signal Corp
Publication date
Application grantedgrantedCritical
Publication of CA674762ApublicationCriticalpatent/CA674762A/en