AU146124B2 - Call tracing arrangements in automatic telephone systems - Google Patents

Call tracing arrangements in automatic telephone systems

Info

Publication number: AU146124B2
Authority: AU; Australia
Prior art keywords: arrangements; telephone systems; automatic telephone; call tracing; tracing
Prior art date: 1949-01-21
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 - Lifetime

Application number

AU25470/49A

Original Assignee

present invention relates to auto through from one stage or rank to another matic telephone systems, andmore particu often arises in automatic telephone systems larly to call tracing

Filing date

1949-01-21

Publication of AU146124B2 publication Critical patent/AU146124B2/en

1949-01-21 Application filed by present invention relates to auto through from one stage or rank to another matic telephone systems, andmore particu often arises in automatic telephone systems larly to call tracing filed Critical present invention relates to auto through from one stage or rank to another matic telephone systems, andmore particu often arises in automatic telephone systems larly to call tracing

1969-01-21 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

AU25470/49A 1949-01-21 Call tracing arrangements in automatic telephone systems Expired - Lifetime AU146124B2 (en)

Publications (1)

Publication Number	Publication Date
AU146124B2 true AU146124B2 (en)

Family

ID=

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