CA409858A - Systeme telephonique - Google Patents

Systeme telephonique

Info

Publication number
CA409858A
CA409858A CA409858A CA409858DA CA409858A CA 409858 A CA409858 A CA 409858A CA 409858 A CA409858 A CA 409858A CA 409858D A CA409858D A CA 409858DA CA 409858 A CA409858 A CA 409858A
Authority
CA
Canada
Prior art keywords
telephone system
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
CA409858A
Other languages
English (en)
Inventor
Emerson Hersey Ralph
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 CA409858A publication Critical patent/CA409858A/fr
Expired legal-status Critical Current

Links

CA409858A Systeme telephonique Expired CA409858A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA409858T

Publications (1)

Publication Number Publication Date
CA409858A true CA409858A (fr) 1943-01-05

Family

ID=35421160

Family Applications (1)

Application Number Title Priority Date Filing Date
CA409858A Expired CA409858A (fr) Systeme telephonique

Country Status (1)

Country Link
CA (1) CA409858A (fr)

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