CA182757A - Testing device for telephone exchange systems - Google Patents

Testing device for telephone exchange systems

Info

Publication number
CA182757A
CA182757A CA000182757A CA182757DA CA182757A CA 182757 A CA182757 A CA 182757A CA 000182757 A CA000182757 A CA 000182757A CA 182757D A CA182757D A CA 182757DA CA 182757 A CA182757 A CA 182757A
Authority
CA
Canada
Prior art keywords
testing device
telephone exchange
exchange systems
systems
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
CA000182757A
Other languages
French (fr)
Inventor
Henry Peter Clausen
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
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 filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Application granted granted Critical
Publication of CA182757A publication Critical patent/CA182757A/en
Expired legal-status Critical Current

Links

CA000182757A 1917-02-22 1917-02-22 Testing device for telephone exchange systems Expired CA182757A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA182757T 1917-02-22

Publications (1)

Publication Number Publication Date
CA182757A true CA182757A (en) 1918-03-05

Family

ID=45302409

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000182757A Expired CA182757A (en) 1917-02-22 1917-02-22 Testing device for telephone exchange systems

Country Status (1)

Country Link
CA (1) CA182757A (en)

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