CA164712A - Telephone exchange system - Google Patents

Telephone exchange system

Info

Publication number
CA164712A
CA164712A CA164712DA CA164712A CA 164712 A CA164712 A CA 164712A CA 164712D A CA164712D A CA 164712DA CA 164712 A CA164712 A CA 164712A
Authority
CA
Canada
Prior art keywords
exchange system
telephone exchange
telephone
exchange
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
Other languages
French (fr)
Inventor
Morton Lewis Johnson
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.)
FRANK B COOK Co
Original Assignee
FRANK B COOK Co
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 FRANK B COOK Co filed Critical FRANK B COOK Co
Application granted granted Critical
Publication of CA164712A publication Critical patent/CA164712A/en
Expired legal-status Critical Current

Links

CA164712D 1913-06-18 1913-06-18 Telephone exchange system Expired CA164712A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA164712T 1913-06-18

Publications (1)

Publication Number Publication Date
CA164712A true CA164712A (en) 1915-09-07

Family

ID=45284392

Family Applications (1)

Application Number Title Priority Date Filing Date
CA164712D Expired CA164712A (en) 1913-06-18 1913-06-18 Telephone exchange system

Country Status (1)

Country Link
CA (1) CA164712A (en)

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