CA473689A - Circuits de sonneries telephoniques - Google Patents

Circuits de sonneries telephoniques

Info

Publication number
CA473689A
CA473689A CA473689A CA473689DA CA473689A CA 473689 A CA473689 A CA 473689A CA 473689 A CA473689 A CA 473689A CA 473689D A CA473689D A CA 473689DA CA 473689 A CA473689 A CA 473689A
Authority
CA
Canada
Prior art keywords
ringer circuits
ringer
circuits
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
CA473689A
Other languages
English (en)
Inventor
A. Shann Oscar
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 CA473689A publication Critical patent/CA473689A/fr
Expired legal-status Critical Current

Links

CA473689A Circuits de sonneries telephoniques Expired CA473689A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA473689T

Publications (1)

Publication Number Publication Date
CA473689A true CA473689A (fr) 1951-05-15

Family

ID=35607660

Family Applications (1)

Application Number Title Priority Date Filing Date
CA473689A Expired CA473689A (fr) Circuits de sonneries telephoniques

Country Status (1)

Country Link
CA (1) CA473689A (fr)

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