CA312227A - Zone metering telephone exchange system - Google Patents

Zone metering telephone exchange system

Info

Publication number
CA312227A
CA312227A CA312227A CA312227DA CA312227A CA 312227 A CA312227 A CA 312227A CA 312227 A CA312227 A CA 312227A CA 312227D A CA312227D A CA 312227DA CA 312227 A CA312227 A CA 312227A
Authority
CA
Canada
Prior art keywords
exchange system
telephone exchange
zone metering
metering telephone
zone
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
CA312227A
Other languages
French (fr)
Inventor
Hatton William
De Vriendt Charles
J. Rousseau Earnest
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
Application granted granted Critical
Publication of CA312227A publication Critical patent/CA312227A/en
Expired legal-status Critical Current

Links

CA312227A Zone metering telephone exchange system Expired CA312227A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA312227T

Publications (1)

Publication Number Publication Date
CA312227A true CA312227A (en) 1931-06-09

Family

ID=35271553

Family Applications (1)

Application Number Title Priority Date Filing Date
CA312227A Expired CA312227A (en) Zone metering telephone exchange system

Country Status (1)

Country Link
CA (1) CA312227A (en)

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