CA508242A - Telephone ringing power plant - Google Patents

Telephone ringing power plant

Info

Publication number
CA508242A
CA508242A CA508242A CA508242DA CA508242A CA 508242 A CA508242 A CA 508242A CA 508242 A CA508242 A CA 508242A CA 508242D A CA508242D A CA 508242DA CA 508242 A CA508242 A CA 508242A
Authority
CA
Canada
Prior art keywords
power plant
telephone ringing
ringing power
telephone
plant
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
CA508242A
Other languages
French (fr)
Inventor
S. Ross Walter
K. Mills John
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 CA508242A publication Critical patent/CA508242A/en
Expired legal-status Critical Current

Links

CA508242A Telephone ringing power plant Expired CA508242A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA508242T

Publications (1)

Publication Number Publication Date
CA508242A true CA508242A (en) 1954-12-14

Family

ID=35659282

Family Applications (1)

Application Number Title Priority Date Filing Date
CA508242A Expired CA508242A (en) Telephone ringing power plant

Country Status (1)

Country Link
CA (1) CA508242A (en)

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