AU148784B2 - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
AU148784B2
AU148784B2 AU30172/49A AU3017249A AU148784B2 AU 148784 B2 AU148784 B2 AU 148784B2 AU 30172/49 A AU30172/49 A AU 30172/49A AU 3017249 A AU3017249 A AU 3017249A AU 148784 B2 AU148784 B2 AU 148784B2
Authority
AU
Australia
Prior art keywords
telephone systems
telephone
systems
Prior art date
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
AU30172/49A
Other versions
AU3017249A (en
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co Ltd
Filing date
Publication date
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Application granted granted Critical
Publication of AU3017249A publication Critical patent/AU3017249A/en
Publication of AU148784B2 publication Critical patent/AU148784B2/en
Expired legal-status Critical Current

Links

AU30172/49A 1949-09-29 Improvements in telephone systems Expired AU148784B2 (en)

Publications (2)

Publication Number Publication Date
AU3017249A AU3017249A (en) 1949-12-01
AU148784B2 true AU148784B2 (en) 1949-12-01

Family

ID=

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