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
CA591642A
Inventor
F. Ringelman John
G. Timmel Frederick
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
Publication date
Application grantedgrantedCritical
Publication of CA591642ApublicationCriticalpatent/CA591642A/en