CA621994A - Telephone bell ringing circuits - Google Patents

Telephone bell ringing circuits

Info

Publication number
CA621994A
CA621994A CA621994A CA621994DA CA621994A CA 621994 A CA621994 A CA 621994A CA 621994 A CA621994 A CA 621994A CA 621994D A CA621994D A CA 621994DA CA 621994 A CA621994 A CA 621994A
Authority
CA
Canada
Prior art keywords
bell ringing
telephone bell
ringing circuits
circuits
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
CA621994A
Inventor
C. Barker Robert
H. Flowers Thomas
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.)
HER MAJESTY'S POSTMASTER GENERAL OF GREAT BRITAIN
Original Assignee
HER MAJESTY'S POSTMASTER GENERAL OF GREAT BRITAIN
Publication date
Application granted granted Critical
Publication of CA621994A publication Critical patent/CA621994A/en
Expired legal-status Critical Current

Links

CA621994A Telephone bell ringing circuits Expired CA621994A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA621994T

Publications (1)

Publication Number Publication Date
CA621994A true CA621994A (en) 1961-06-13

Family

ID=35877178

Family Applications (1)

Application Number Title Priority Date Filing Date
CA621994A Expired CA621994A (en) Telephone bell ringing circuits

Country Status (1)

Country Link
CA (1) CA621994A (en)

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