CA333301A - Call charging telephone exchange system - Google Patents

Call charging telephone exchange system

Info

Publication number: CA333301A
Authority: CA; Canada
Prior art keywords: exchange system; telephone exchange; call charging; charging telephone; call
Prior art date: 1933-06-13
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

CA333301A

Other languages

French (fr)

Inventor

Howes Johnson Lewis

Stewart Gibson Earl

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.)

AT&T Corp

Original Assignee

Western Electric Co Inc

Publication date

1933-06-13

1933-06-13 Application granted granted Critical

1933-06-13 Publication of CA333301A publication Critical patent/CA333301A/en

Status Expired legal-status Critical Current

Links

CA333301A Call charging telephone exchange system Expired CA333301A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA333301T

Publications (1)

Publication Number	Publication Date
CA333301A true CA333301A (en)	1933-06-13

Family

ID=35296443

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA333301A Expired CA333301A (en)			Call charging telephone exchange system

Country Status (1)

Country	Link
CA (1)	CA333301A (en)

0
- CA CA333301A patent/CA333301A/en not_active Expired

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