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.)
TEL-TONE Corp
Original Assignee
TEL-TONE 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 US05/796,236external-prioritypatent/US4121880A/en
Application filed by TEL-TONE CorpfiledCriticalTEL-TONE Corp
Priority to CA359,512ApriorityCriticalpatent/CA1099359A/fr
Application grantedgrantedCritical
Publication of CA1099359ApublicationCriticalpatent/CA1099359A/fr