CA815602A - Key telephone control systems - Google Patents

Key telephone control systems

Info

Publication number
CA815602A
CA815602A CA815602A CA815602DA CA815602A CA 815602 A CA815602 A CA 815602A CA 815602 A CA815602 A CA 815602A CA 815602D A CA815602D A CA 815602DA CA 815602 A CA815602 A CA 815602A
Authority
CA
Canada
Prior art keywords
control systems
key telephone
telephone control
key
systems
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
CA815602A
Inventor
D. Limiero Albert
R. Mceowen James
A. Spencer Jonathan
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 CA815602A publication Critical patent/CA815602A/en
Expired legal-status Critical Current

Links

CA815602A Key telephone control systems Expired CA815602A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA815602T

Publications (1)

Publication Number Publication Date
CA815602A true CA815602A (en) 1969-06-17

Family

ID=36288122

Family Applications (1)

Application Number Title Priority Date Filing Date
CA815602A Expired CA815602A (en) Key telephone control systems

Country Status (1)

Country Link
CA (1) CA815602A (en)

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