CA578530A - Automatic telephone system - Google Patents

Automatic telephone system

Info

Publication number
CA578530A
CA578530A CA578530A CA578530DA CA578530A CA 578530 A CA578530 A CA 578530A CA 578530 A CA578530 A CA 578530A CA 578530D A CA578530D A CA 578530DA CA 578530 A CA578530 A CA 578530A
Authority
CA
Canada
Prior art keywords
telephone system
automatic telephone
automatic
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
CA578530A
Other languages
French (fr)
Inventor
M. Blackhall James
Oxaal Arne
J. Bergman Walter
H. Blashfield William
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.)
North Electric Co
Original Assignee
North Electric Co
Publication date
Application granted granted Critical
Publication of CA578530A publication Critical patent/CA578530A/en
Expired legal-status Critical Current

Links

CA578530A Automatic telephone system Expired CA578530A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA578530T

Publications (1)

Publication Number Publication Date
CA578530A true CA578530A (en) 1959-06-30

Family

ID=35754401

Family Applications (1)

Application Number Title Priority Date Filing Date
CA578530A Expired CA578530A (en) Automatic telephone system

Country Status (1)

Country Link
CA (1) CA578530A (en)

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