CA449229A - Systeme telephonique - Google Patents

Systeme telephonique

Info

Publication number
CA449229A
CA449229A CA449229A CA449229DA CA449229A CA 449229 A CA449229 A CA 449229A CA 449229 A CA449229 A CA 449229A CA 449229D A CA449229D A CA 449229DA CA 449229 A CA449229 A CA 449229A
Authority
CA
Canada
Prior art keywords
telephone
signalling system
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
CA449229A
Other languages
English (en)
Inventor
Edmund Beale Charles
Gillings Charles
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co Ltd
Publication date
Application granted granted Critical
Publication of CA449229A publication Critical patent/CA449229A/fr
Expired legal-status Critical Current

Links

CA449229A Systeme telephonique Expired CA449229A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA449229T

Publications (1)

Publication Number Publication Date
CA449229A true CA449229A (fr) 1948-06-22

Family

ID=35566935

Family Applications (1)

Application Number Title Priority Date Filing Date
CA449229A Expired CA449229A (fr) Systeme telephonique

Country Status (1)

Country Link
CA (1) CA449229A (fr)

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