CA216391A - Enclanchement d'appels telephoniques - Google Patents

Enclanchement d'appels telephoniques

Info

Publication number
CA216391A
CA216391A CA216391A CA216391DA CA216391A CA 216391 A CA216391 A CA 216391A CA 216391 A CA216391 A CA 216391A CA 216391D A CA216391D A CA 216391DA CA 216391 A CA216391 A CA 216391A
Authority
CA
Canada
Prior art keywords
lockout
electrical circuits
signalling device
signalling
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
CA216391A
Other languages
English (en)
Inventor
Mcculloch William
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.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA216391A publication Critical patent/CA216391A/fr
Expired legal-status Critical Current

Links

CA216391A Enclanchement d'appels telephoniques Expired CA216391A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA216391T

Publications (1)

Publication Number Publication Date
CA216391A true CA216391A (fr) 1922-03-07

Family

ID=35110835

Family Applications (1)

Application Number Title Priority Date Filing Date
CA216391A Expired CA216391A (fr) Enclanchement d'appels telephoniques

Country Status (1)

Country Link
CA (1) CA216391A (fr)

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