CA617161A - Step-by-step telephone systems - Google Patents

Step-by-step telephone systems

Info

Publication number
CA617161A
CA617161A CA617161A CA617161DA CA617161A CA 617161 A CA617161 A CA 617161A CA 617161 A CA617161 A CA 617161A CA 617161D A CA617161D A CA 617161DA CA 617161 A CA617161 A CA 617161A
Authority
CA
Canada
Prior art keywords
telephone systems
systems
telephone
step 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
CA617161A
Inventor
B. Sladek Robert
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 CA617161A publication Critical patent/CA617161A/en
Expired legal-status Critical Current

Links

CA617161A Step-by-step telephone systems Expired CA617161A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA617161T

Publications (1)

Publication Number Publication Date
CA617161A true CA617161A (en) 1961-03-28

Family

ID=35859458

Family Applications (1)

Application Number Title Priority Date Filing Date
CA617161A Expired CA617161A (en) Step-by-step telephone systems

Country Status (1)

Country Link
CA (1) CA617161A (en)

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