CA507381A - Systeme d'echange electronique de telephone - Google Patents

Systeme d'echange electronique de telephone

Info

Publication number
CA507381A
CA507381A CA507381A CA507381DA CA507381A CA 507381 A CA507381 A CA 507381A CA 507381 A CA507381 A CA 507381A CA 507381D A CA507381D A CA 507381DA CA 507381 A CA507381 A CA 507381A
Authority
CA
Canada
Prior art keywords
exchange system
telephone exchange
electronic telephone
electronic
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
CA507381A
Other languages
English (en)
Inventor
H. Ransom David
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 Telephone and Telegraph Corp
Original Assignee
International Telephone and Telegraph Corp
Publication date
Application granted granted Critical
Publication of CA507381A publication Critical patent/CA507381A/fr
Expired legal-status Critical Current

Links

CA507381A Systeme d'echange electronique de telephone Expired CA507381A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA507381T

Publications (1)

Publication Number Publication Date
CA507381A true CA507381A (fr) 1954-11-16

Family

ID=35653320

Family Applications (1)

Application Number Title Priority Date Filing Date
CA507381A Expired CA507381A (fr) Systeme d'echange electronique de telephone

Country Status (1)

Country Link
CA (1) CA507381A (fr)

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