CA220091A - Systeme d'echange telephonique - Google Patents

Systeme d'echange telephonique

Info

Publication number
CA220091A
CA220091A CA220091A CA220091DA CA220091A CA 220091 A CA220091 A CA 220091A CA 220091 A CA220091 A CA 220091A CA 220091D A CA220091D A CA 220091DA CA 220091 A CA220091 A CA 220091A
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
CA220091A
Other languages
English (en)
Inventor
Samuel B. Williams, Jr.
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.)
INTERNATIONAL WESTERN ELECTRIC Co
Original Assignee
INTERNATIONAL WESTERN ELECTRIC Co
Publication date
Application granted granted Critical
Publication of CA220091A publication Critical patent/CA220091A/fr
Expired legal-status Critical Current

Links

CA220091A Systeme d'echange telephonique Expired CA220091A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA220091T

Publications (1)

Publication Number Publication Date
CA220091A true CA220091A (fr) 1922-06-27

Family

ID=35114535

Family Applications (1)

Application Number Title Priority Date Filing Date
CA220091A Expired CA220091A (fr) Systeme d'echange telephonique

Country Status (1)

Country Link
CA (1) CA220091A (fr)

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