AU218681B2 - Improvements in or relating to telephone ringing equipment - Google Patents

Improvements in or relating to telephone ringing equipment

Info

Publication number
AU218681B2
AU218681B2 AU28371/57A AU2837157A AU218681B2 AU 218681 B2 AU218681 B2 AU 218681B2 AU 28371/57 A AU28371/57 A AU 28371/57A AU 2837157 A AU2837157 A AU 2837157A AU 218681 B2 AU218681 B2 AU 218681B2
Authority
AU
Australia
Prior art keywords
relating
telephone ringing
ringing equipment
equipment
telephone
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
AU28371/57A
Other versions
AU2837157A (en
Inventor
Spence Leman and George John Preston Barnes Hugh
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.)
Nokia Services Ltd
Original Assignee
Standard Telephone and Cables Pty Ltd
Filing date
Publication date
Application filed by Standard Telephone and Cables Pty Ltd filed Critical Standard Telephone and Cables Pty Ltd
Application granted granted Critical
Publication of AU218681B2 publication Critical patent/AU218681B2/en
Publication of AU2837157A publication Critical patent/AU2837157A/en
Expired legal-status Critical Current

Links

AU28371/57A 1957-06-15 Improvements in or relating to telephone ringing equipment Expired AU218681B2 (en)

Publications (2)

Publication Number Publication Date
AU218681B2 true AU218681B2 (en) 1957-12-05
AU2837157A AU2837157A (en) 1957-12-05

Family

ID=

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