CA181331A - Systeme de signaux telephoniques - Google Patents

Systeme de signaux telephoniques

Info

Publication number
CA181331A
CA181331A CA000181331A CA181331DA CA181331A CA 181331 A CA181331 A CA 181331A CA 000181331 A CA000181331 A CA 000181331A CA 181331D A CA181331D A CA 181331DA CA 181331 A CA181331 A CA 181331A
Authority
CA
Canada
Prior art keywords
signalling system
telephone signalling
telephone
signalling
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
CA000181331A
Other languages
English (en)
Inventor
Alben E. Lundell
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 Inc
Original Assignee
Western Electric Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Application granted granted Critical
Publication of CA181331A publication Critical patent/CA181331A/fr
Expired legal-status Critical Current

Links

CA000181331A 1917-02-20 1917-02-20 Systeme de signaux telephoniques Expired CA181331A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA181331T 1917-02-20

Publications (1)

Publication Number Publication Date
CA181331A true CA181331A (fr) 1917-12-25

Family

ID=45300983

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000181331A Expired CA181331A (fr) 1917-02-20 1917-02-20 Systeme de signaux telephoniques

Country Status (1)

Country Link
CA (1) CA181331A (fr)

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