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.)
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.)
American Television and Communications Corp
Original Assignee
American Television and Communications Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US05/957,176external-prioritypatent/US4222068A/en
Application filed by American Television and Communications CorpfiledCriticalAmerican Television and Communications Corp
Priority to CA000405944ApriorityCriticalpatent/CA1150819A/fr
Application grantedgrantedCritical
Publication of CA1150819ApublicationCriticalpatent/CA1150819A/fr