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
AU42313/68A
Inventor
Ackermann Friedrich
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
Application filedfiledCritical
Publication of AU4231368ApublicationCriticalpatent/AU4231368A/en
AU42313/68A1967-08-251968-08-20Circuit arrangement for private branch exchanges with exchanges connected together through tie lines
ExpiredAU4231368A
(en)