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
CA916798A
Inventor
B. Ettlinger Adrian
Renville H. Mcmann, Jr.
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 Broadcasting Inc
Original Assignee
Columbia Broadcasting System Inc
Publication date
Application grantedgrantedCritical
Publication of CA916798ApublicationCriticalpatent/CA916798A/en