CA663880A - Burglar alarm system with alternating current supervision - Google Patents

Burglar alarm system with alternating current supervision

Info

Publication number
CA663880A
CA663880A CA663880A CA663880DA CA663880A CA 663880 A CA663880 A CA 663880A CA 663880 A CA663880 A CA 663880A CA 663880D A CA663880D A CA 663880DA CA 663880 A CA663880 A CA 663880A
Authority
CA
Canada
Prior art keywords
alternating current
alarm system
burglar alarm
current supervision
supervision
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
CA663880A
Inventor
W. Muehter Manfred
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.)
American District Telegraph Co
Original Assignee
American District Telegraph Co
Publication date
Application granted granted Critical
Publication of CA663880A publication Critical patent/CA663880A/en
Expired legal-status Critical Current

Links

CA663880A Burglar alarm system with alternating current supervision Expired CA663880A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA663880T

Publications (1)

Publication Number Publication Date
CA663880A true CA663880A (en) 1963-05-28

Family

ID=35957998

Family Applications (1)

Application Number Title Priority Date Filing Date
CA663880A Expired CA663880A (en) Burglar alarm system with alternating current supervision

Country Status (1)

Country Link
CA (1) CA663880A (en)

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