CA438278A - Circuit d'avertisseur - Google Patents

Circuit d'avertisseur

Info

Publication number
CA438278A
CA438278A CA438278A CA438278DA CA438278A CA 438278 A CA438278 A CA 438278A CA 438278 A CA438278 A CA 438278A CA 438278D A CA438278D A CA 438278DA CA 438278 A CA438278 A CA 438278A
Authority
CA
Canada
Prior art keywords
alarm circuit
alarm
circuit
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
CA438278A
Other languages
English (en)
Inventor
Albert Roundburg Eric
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
American Telephone and Telegraph Co Inc
Western Electric Co Inc
Publication date
Application granted granted Critical
Publication of CA438278A publication Critical patent/CA438278A/fr
Expired legal-status Critical Current

Links

CA438278A Circuit d'avertisseur Expired CA438278A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA438278T

Publications (1)

Publication Number Publication Date
CA438278A true CA438278A (fr) 1946-11-26

Family

ID=35553513

Family Applications (1)

Application Number Title Priority Date Filing Date
CA438278A Expired CA438278A (fr) Circuit d'avertisseur

Country Status (1)

Country Link
CA (1) CA438278A (fr)

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